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Overview

The message box handles more than text. Attach files, dictate by voice, and reference your documents or design standards with @. This guide covers each, plus the shortcuts.
The chat with the message box at the bottom: + button on the left, microphone and send on the right
The pills above the chat set the context for every message: the agent you’re talking to (top-left dropdown) and the design standard next to it, which sets the code region your answers cite (US, Eurocode, Australia/NZ, Canada, Philippines, Singapore).
The design standard selector open, with US selected

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Typing and sending

Enter sends. Shift + Enter adds a line break for prompts with a list of requirements. The send button (↑, bottom-right) becomes a stop button while the agent is responding.
You can type your next message while the agent is still working. Press Enter and it queues, then sends the moment the current response finishes.

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Adding files

Attach with the + button at the bottom-left of the message box, then Upload from computer. Drag-and-drop anywhere on the page and pasting images work too.
The + menu open, showing Upload from computer and the Formatting standards toggle
Up to 10 files per message: PDFs, images, Excel/CSV, Word, PowerPoint, and model files (IFC, RVT, DXF, DWG). Each attachment shows a preview card with upload progress.
Already uploaded it once? Type @ and tag the file from your Files instead of re-uploading. See Mentions.

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The Formatting standards toggle

The second row of the + menu controls whether the agent works from your Standards folder: the templates and boilerplate your company maintains. On by default, which is why deliverables come back in your format without you asking.
Two different things share the word “standards”. The Formatting standards toggle points at your own Standards folder (your templates). The @ picker’s Standards section is the built-in design code library (ACI, AISC, ASCE). See Mentions for the second one.

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The project picker

On the Review Agent and BIM Agent, a Select project pill appears next to +. It sets which project folder the agent reads from and saves into. Pick one before sending.
The message box on the Review Agent with the Select project pill

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Dictation

Click the microphone at the bottom-right and talk. A live waveform confirms it’s recording, and your words appear in the input as you speak.
The message box while recording: a live waveform with the stop button on the right
Click the stop button (the square that replaces the mic) to finish. The transcript lands in the message box to review and edit before sending; nothing sends automatically. Recordings run up to 5 minutes.

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Autocomplete

As you type, the input may offer a grey inline completion. Tab accepts it; keep typing to ignore it. After a task finishes, the empty input may suggest a likely next prompt, which Tab accepts too.

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Shortcuts

ShortcutWhat it does
EnterSend
Shift + EnterNew line
TabAccept the grey autocomplete
@Open the file and standards picker (Mentions)
/Focus the message box from anywhere
EscClose the picker; stop a response; press twice to clear the input
↑ (empty input)Recall your queued message for editing
⌘K / Ctrl+KSearch past conversations

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Next steps

Mentions & Attachments

Tag files, folders, and design codes with @ instead of re-uploading.

Your Standards Folder

What the Formatting standards toggle points at.

Structural Agent

Put the input to work on real engineering tasks.

The Canvas

Where the documents you ask for take shape.
Questions? Email support@stru.ai or book a call.