Files Centrus makes for you

When you ask for a file, Centrus gathers what it needs from your files, your integrations and anything you attach, builds the document and checks it before it replies. The finished file appears as a card under the answer. Click the card and the file opens beside the chat, where you can read it, ask for changes and save it.

app.centrus.ai/app/chat

John Martin

Riverside House visit report

last message sent: 1 minute ago

Technical

Turn Sarah's notes from this morning's visit to Riverside House into a visit report, as a PDF.

09:02

Worked · 5 steps

Here is the visit report for Riverside House, 09/10/2026.

Riverside visit report.pdf

09:06

Add an actions table with an owner and due date for each action, and a sign-off box for the site manager.

09:11

Worked · 3 steps

Done. Version 2 adds an Actions table after the findings, and a sign-off box for the site manager on page 2.

Riverside visit report.pdf1

09:14

Working on Riverside visit report.pdf · v2

2

Type a message...

3

Riverside visit report.pdf

PDF · 238 kB · v2 of 2

4

v2 / 2

5Latest

Changes

6 Source

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Visit report1/ 2100%

Planned maintenance visit report

Riverside House

Visit date09/10/2026

SiteRiverside House

EngineerSarah Price

Job48213

Arrived08:30

Left12:15

ContractPPM, quarterly

Summary

Quarterly planned maintenance visit. The Zone 3 fire panel was tested and detector 14, which had been reporting an intermittent fault, was replaced. Two emergency lighting fittings on floor 2 failed the monthly flick test, and replacement batteries are on order.

Findings

Asset	Finding	Result
Zone 3 fire panel	Detector 14 reporting an intermittent fault	Head replaced, panel reset and tested
Emergency lighting, floor 2	Two fittings failed the flick test	Batteries ordered
Boiler 1	Flue gas reading within range	No action needed

Actions

Action	Owner	Due
Fit new batteries to the two floor 2 fittings	Sarah Price	15/10/2026
Retest emergency lighting on floor 2	Sarah Price	15/10/2026
Confirm detector 14 stays clear for 7 days	Dylan Hughes	16/10/2026

Notes

Access was through the loading bay. The plant room key was collected from reception and returned at 12:10.

1. 1The file card under Centrus's answer. Click it to open the file beside the chat.
2. 2Working on: the file your next message will change.
3. 3The divider. Drag it to give the chat or the file more room.
4. 4The file's name, type, size and version.
5. 5Step between versions of the file. Latest jumps back to the newest.
6. 6Changes: what is different from the version before.
7. 7Ask about the file, open it in a new tab, save it, or close the pane.

Opening a file puts the page in full view, so the menu, the page heading and the chat list are hidden while you work on it. Closing the file brings them back.

• Spreadsheets, as Excel workbooks (.xlsx) or CSV files, such as a PPM schedule or a list of overdue jobs.
• Slide decks in PowerPoint (.pptx), such as a quarterly review for a client.
• PDFs, such as a filled-in RAMS or a letter to a customer. If you do not name a format, you get a PDF.
• Word documents (.docx), for anything you want to edit afterwards.
• Charts, saved as PNG pictures.
• Reports of several pages, as a PDF or a Word file, such as a site, job or visit report.
• Data profiles that summarise a table or CSV file already in the chat.

Centrus can also write notes as a Markdown (.md) file, or put several files together in a .zip. One answer can bring back up to 20 files.

What you can get depends on the chat's AI model. GPT-5.2 and every model after it, GPT-6 Astra included, can make all of these. GPT-5, GPT-5.1, GPT-4.1 and GPT-4o, and their Mini and Nano versions, can make spreadsheets, CSV files and PNG charts only. The O1, O3, O3 Mini and O4 Mini models cannot make files. See Choose the AI model.

Ask in plain words, as you would ask a colleague. Centrus only builds a file when you ask for one. Questions, lookups and summaries are answered in the chat as normal.

John Martin

Riverside House visit report

last message sent: less than a minute ago

Technical

Make a PDF visit report for Riverside House from Sarah's notes, attached.

1

Include the findings, an actions table with an owner and due date for each, and a sign-off box for the site manager.

2

Put our logo on the navy header bar and keep it to two pages.

3

Sarah Price visit notes.docx

Riverside House4

09:02

1. 1What to make, and in which format: PDF, Word, Excel, CSV or PowerPoint.
2. 2What goes in it: the sections, the tables and their columns.
3. 3How it should look: the header, the logo, the length.
4. 4Anything to use, such as your logo, or a photo of a document whose layout you want copied.

Centrus gathers the facts first, from your Train files, your connected systems and anything you attach, and then builds the file. When a list from BigChange, Xero, Freshdesk or Fixflo has more results than fit in the chat, Centrus loads every row into the file, not just the first page.

• Name the format if it matters. Without one, Centrus makes a PDF.
• Name the sites, people and dates you mean, such as Riverside House, Sarah Price or October.
• To have the file sent by email, say so, for example email it to me. This needs Gmail or Outlook connected: see Gmail in chat and Microsoft Outlook in chat. With no other address named, it goes to you.
• To get a file again that Centrus made earlier in the chat, ask for it by name and it is attached to the new answer.
• To change a workbook you already keep in Excel or Google Sheets, ask Centrus to update it there. The Excel and Google Sheets integrations do that, and no new file is made: see Microsoft Excel in chat and Google Sheets in chat.

Building a file takes longer than an ordinary answer. The Working panel above the answer lists each step as it happens, such as Reading the skill guide, Building the spreadsheet, Writing the report or Rendering the report, with the file's name beside it.

John Martin

Riverside House visit report

last message sent: less than a minute ago

Technical

Turn Sarah's notes from this morning's visit to Riverside House into a visit report, as a PDF.

09:02

Working · Reviewing the rendered pages

Loading your attachments into the sandbox

Reading the skill guide

Writing the report · Riverside visit report.pdf

Rendering the report · Riverside visit report.pdf

Reviewing the rendered pages

Planned maintenance visit report

Riverside House

Visit date09/10/2026

SiteRiverside House

EngineerSarah Price

Job48213

Arrived08:30

Left12:15

ContractPPM, quarterly

Summary

Quarterly planned maintenance visit. The Zone 3 fire panel was tested and detector 14, which had been reporting an intermittent fault, was replaced. Two emergency lighting fittings on floor 2 failed the monthly flick test, and replacement batteries are on order.

Findings

Asset	Finding	Result
Zone 3 fire panel	Detector 14 reporting an intermittent fault	Head replaced, panel reset and tested
Emergency lighting, floor 2	Two fittings failed the flick test	Batteries ordered
Boiler 1	Flue gas reading within range	No action needed

Next visit

The next quarterly visit is due in January 2027. The floor 2 fittings will be retested once the batteries are fitted.

Notes

Access was through the loading bay. The plant room key was collected from reception and returned at 12:10.

The pages Centrus is checking

Each step as it happens

Type a message...

Stop generating

For a PDF, a deck or a formatted Word document, Centrus renders the pages and looks at them before it replies, and fixes problems it can see, such as overlapping text or a clipped logo. Those page pictures appear in the panel while it is open; click one to look at it beside the chat. To end the answer early, click Stop generating, beside Send.

When Centrus has finished, the panel folds to Worked and the files sit under the answer, above Sources.

John Martin

Riverside House Q3 summary

last message sent: 2 minutes ago

Contracts

Put together the Q3 summary for Riverside House: a short PDF, the call-out log as a spreadsheet, and a chart of call-outs by month.

16:40

Worked · 7 steps

Here is the Q3 summary for Riverside House. There were 29 call-outs between July and September, all inside the 4 hour priority 1 response in the SLA. The full log is in the spreadsheet, and the chart shows each month from April.

Riverside Q3 summary.pdf1

Riverside call-outs Q3.xlsx

2

3

Sources:

• • Riverside House SLA.pdf

16:44

1. 1A file card. Click it to open the file beside the chat.
2. 2The chevron on a card opens the Save menu.
3. 3A chart or picture arrives as a small image. Click it to open it beside the chat.

The files stay with the chat. Come back to it another day and the cards still open and download.

Click a file card and the file opens in a pane beside the chat. PDFs, Word documents and spreadsheets appear as they really look, so you can check a file without downloading it.

What the pane shows depends on the type of file:

• PDFs open in your browser's own PDF viewer.
• Charts and other pictures are shown whole, sized to fit.
• Word documents are drawn page by page.
• Spreadsheets and CSV files show each sheet as a tab, up to the first 1000 rows and 60 columns. A note at the foot says when there is more, so download the file to see all of it.
• Text and Markdown files show as plain text.
• PowerPoint decks preview through a PDF copy from the same answer. Without one, the pane says so: download the deck, or ask Centrus for a PDF copy and it will preview.
• Anything else, such as a .zip, shows No preview for this file type with a Download button.

Drag the divider between the chat and the file to share the width differently. The pane starts at half the width and can be dragged to anything from about a quarter to three quarters of it. Your browser remembers where you left it.

John Martin

Riverside House visit report

Exit full view also closes the file

Turn Sarah's notes from this morning's visit to Riverside House into a visit report, as a PDF.

09:02

Worked · 5 steps

Here is the visit report for Riverside House, 09/10/2026.

Drag to resize

Riverside visit report.pdf

PDF · 212 kB · v1 of 1

Changes Source

Visit report1/ 1100%

Planned maintenance visit report

Riverside House

Visit date09/10/2026

SiteRiverside House

EngineerSarah Price

Job48213

Arrived08:30

Left12:15

ContractPPM, quarterly

Summary

Quarterly planned maintenance visit. The Zone 3 fire panel was tested and detector 14, which had been reporting an intermittent fault, was replaced. Two emergency lighting fittings on floor 2 failed the monthly flick test, and replacement batteries are on order.

Findings

Asset	Finding	Result
Zone 3 fire panel	Detector 14 reporting an intermittent fault	Head replaced, panel reset and tested
Emergency lighting, floor 2	Two fittings failed the flick test	Batteries ordered
Boiler 1	Flue gas reading within range	No action needed

Next visit

The next quarterly visit is due in January 2027. The floor 2 fittings will be retested once the batteries are fitted.

Notes

Access was through the loading bay. The plant room key was collected from reception and returned at 12:10.

To close the pane, click the cross at its top right or press Escape, and the page goes back to how it was before you opened the file. Exit full view, at the top right of the chat, closes the file as well.

The divider only appears on screens at least 1024 pixels wide. On a smaller screen, such as a phone, the file takes the whole screen. Close it to get back to the chat.

To change a file, open it and say what you want in the chat, for example Move the sign-off box to the end of page 1. While the file is open, a Working on chip above the message bar names it and its version, and your next message goes to that file. The new version takes the old one's place in the pane as soon as it is ready.

Click the cross on the chip to ask something unrelated without touching the file. The chip comes back the next time you open a file.

Changes always start from the newest version, and every version is kept, so nothing is lost if a change is not what you wanted. Centrus keeps what each file was built from with the chat, so you can come back later and carry on changing it.

To ask a question about a file rather than change it, click Ask about this file, the speech bubble at the top of the pane. It puts the file's name at the start of a message, such as About Riverside PPM schedule.xlsx:, ready for your question. If you have already typed something, the name is added after it.

John Martin

Riverside House PPM schedule

Here is the PPM schedule for Riverside House, with a tab for October and one for November.

Riverside PPM schedule.xlsx

Working on Riverside PPM schedule.xlsx · v1

About Riverside PPM schedule.xlsx: what is still to book?Starts with the file's name

Riverside PPM schedule.xlsx

Spreadsheet · 18.4 kB · v1 of 1

Changes

Ask about this file

OctoberNovember

#	Asset	Location	Task	Due	Engineer	Status
2	Boiler 1	Plant room	Annual service	06/10/2026	Dylan Hughes	Done
3	Boiler 2	Plant room	Annual service	06/10/2026	Dylan Hughes	Done
4	Zone 3 fire panel	Ground floor riser	Quarterly test	14/10/2026	Sarah Price	Booked
5	Emergency lighting	All floors	Monthly flick test	15/10/2026	Sarah Price	Booked
6	AHU 2	Roof	Filter change	21/10/2026	Dylan Hughes	Booked
7	Water heater	Kitchen	Legionella temperature check	22/10/2026	Ryan Cole	Booked
8	Lift 1	Core	Six-monthly inspection	27/10/2026	Contractor	Booked
9	Dry riser	Stair 2	Annual pressure test	29/10/2026	Sarah Price	To book

Every change makes a new version, and the pane keeps them in order: version 1 is the first one Centrus made. Use the arrows to step back and forward, and Latest to return to the newest. Clicking the card on an earlier answer shows the version that answer made.

To carry on from an older version, say so in your message, for example Start from version 1 and add the actions table again. Otherwise Centrus edits the newest one.

Click Changes to compare the version on show with the one before it, and click it again to go back to the file. Green marks what was added or changed. Red, struck through, marks what was removed.

• Spreadsheets show the current sheet with changed and added cells in green, and a count of cells changed, rows added and rows removed. Point at a changed cell to see what it said before. A dot on a sheet's tab marks a sheet that changed, and removed rows are listed under the sheet.
• Word documents and text files are compared paragraph by paragraph, or line by line. Long runs of unchanged text fold away, and Show everything unfolds them.
• PDFs and pictures are shown side by side, the previous version on the left and the current one on the right.
• PowerPoint decks are compared through their PDF copies. If a version has none, ask for a PDF copy in the chat.
• Other types cannot be compared. Download both versions and compare them yourself.

Spreadsheet rows are compared by their position, not their content. If a row is added or removed near the top of a sheet, every row below it shows as changed. Formatting is not compared, and only the first 1000 rows and 60 columns of each sheet are checked.

Source shows what a version was built from: a record of what you asked for, the script that builds the file and any template it uses. It is read-only. Most people never need it, but it is there if you want to see exactly how a file was put together.

The chevron on a file card, and the download button at the top of the pane, open the Save menu.

John Martin

Riverside House visit report

last message sent: 3 minutes ago

Technical

Worked · 3 steps

Done. Version 2 adds an Actions table after the findings, and a sign-off box for the site manager on page 2.

Riverside visit report.pdf

Save to Downloads

Save as…

Save to OneDrive…

Save to Google Drive…

Open in a new tab

Connect Google Docs or Google Sheets on the Integrations page to enable saving to Google Drive.

09:14

• Save to Downloads downloads the file, as your browser normally does.
• Save as… lets you choose the folder and the name. It is offered in Chrome and Edge only.
• Save to OneDrive… needs Microsoft Excel or Microsoft Word connected to your account. See Microsoft Excel in chat and Microsoft Word in chat.
• Save to Google Drive… needs Google Docs or Google Sheets connected to your account. See Google Docs in chat and Google Sheets in chat.
• Open in a new tab opens the file in your browser.

Without the right connection, the drive is greyed out, and pointing at it tells you which integration to connect. To save to a drive:

1. 1Click the chevron on the file card, or the download button at the top of the pane.
2. 2Choose Save to OneDrive… or Save to Google Drive….
3. 3Type a folder in Folder (optional), such as Riverside House/Reports, or leave it blank to save to the top of your OneDrive or My Drive. Folders that do not exist yet are created.
4. 4Click Save. A message at the top of the page confirms where the file went, with an Open link.

Save to OneDrive

Riverside visit report.pdf will be saved to your OneDrive. A file with the same name is never overwritten.

Folder (optional)

Riverside House/Reports

Leave blank for the OneDrive root. Folders are created if they do not exist. Manage the connection under Integrations.

CancelSave

1

Saved Riverside visit report.pdf to OneDrive in Riverside House/Reports. Open2

1. 1Save to OneDrive, with a folder typed in.
2. 2The message once the file is saved. Open takes you to it.

A file with the same name is never overwritten: the new copy gets (1), (2) and so on after its name. Files up to 100 MB can be saved this way. You can also ask in the chat, for example Save it to my OneDrive in Riverside House/Reports, and Centrus saves it for you.

Saving straight to SharePoint or Dropbox is not offered. Download the file and upload it there.

Saving to OneDrive or Google Drive always saves the newest version of a file, even from an older answer's card or while the pane shows an older version. To keep an older version, open it and use Save to Downloads, which saves the version on show.

Whenever Centrus makes a file, it follows a skill: instructions, and sometimes a template, for one kind of document. Seven Centrus skills cover spreadsheets, slides, PDFs, Word documents, data insights, charts and professional reports. Your organisation can add its own, such as a visit report in your house style with your logo, and Centrus picks the skill that fits your request without being told. When a file comes out the way you want it, you can ask Centrus to save its layout as a skill so the next one matches. See Skills.

On WhatsApp, the answer ends with a Files list of links, and each file also arrives as a WhatsApp attachment if it is small enough. See Message Centrus on WhatsApp.

09:41

Centrus

Send me the Gas Safe RAMS template filled in for Riverside House, as a PDF

14:05

Message received, generating response, please wait…

14:05

Here is the RAMS for Riverside House, filled in from the Gas Safe RAMS template with the site address, the access arrangements and the plant room hazards.

Files - RAMS Riverside House.pdf: https://app.centrus.ai/files/rams-riverside-house.pdf1

14:07

RAMS Riverside House.pdf3 pages · PDF · 212 kB

14:07

2

Message

In Microsoft Teams, the answer ends with the same Files list of links. See Chat on Microsoft Teams.

The links stop working after seven days, so save anything you need to keep. The files are also in the conversation in Chat on the web.

• A message in which Centrus builds in its document sandbox costs two extra message credits on top of the usual charge, once for that message however many steps it takes. The charge applies even if no file comes out. See Credits and browser minutes.
• A message you stop before any of the answer arrives is not charged.
• Up to 20 files come back from one answer. A file over 25 MB, or anything past 40 MB in total, is left out without a warning, so ask for very large exports in parts.
• Saving to OneDrive or Google Drive takes files of up to 100 MB.
• Versions are matched by the file's name. If a changed file comes back under a new name, it starts again at version 1.
• Ask about this file, Changes and Source only appear for files Centrus made, not for files you attached.
• If saving to Google Drive says your connection can only read Drive, disconnect Google Docs or Google Sheets on the Integrations page and connect it again.
• If the pane says This file could not be loaded, use its Download button to get the file instead.

Admins can turn file making off for the whole organisation under Settings, then Organisation, with Enable document sandbox in chat. It is on by default. While it is off, Centrus cannot build files in chat, and lookups in BigChange, Xero, Sage and your other integrations carry on as normal. Centrus also cannot make files if every Centrus skill is switched off and your organisation has no skills of its own. See Organisation settings.