Glass Canvas

Glass Canvas is a Beta feature and starts turned off. Enable it in Settings → Agent → Glass Canvas. On Mac, its default shortcut is Option + Command + G; the Settings control also opens it.

Make a board

Open the canvas, then choose a tool: Select, Note, Writing, Pen, Paint, Shapes, Connect, Web card, or Screenshot. Hover over a tool for its shortcut. You can paste or drop images and double-click supported shapes to add labels.

Use Boards → New board for a separate workspace. Save a copy gives you a second version before a large change. Boards save as you work; an exported page is a separate snapshot.

Capture and connect

The Screenshot tool lets you drag a region or capture a display. On Mac it needs Screen Recording permission. The canvas hides itself during capture so its own glass and controls do not become the picture.

Web cards load supported secure sites or local previews. They share Nock’s browser profile, including its sign-ins. A card can show a still image while you move around and become interactive when focused.

Ask for a diagram

Try “Make a three-step diagram of this workflow” or “Arrange these notes into two columns.” The agent can work with board text, positions, shapes, and connections. Check labels and arrows: a neatly arranged diagram can still contain an incorrect explanation.

Removing items or clearing a board needs confirmation. Use Undo for an unwanted change and keep a separate copy before a substantial rearrangement.

Export

Export saves an HTML page in your Documents/Nock Canvases folder. Use Open or Show in Finder in the result to inspect it. Exporting the same board name again replaces that exported page, so rename or copy an earlier export if you need both versions. Embedded content that depends on a remote website still needs that website to be reachable.

Board files stay local, but web cards contact their sites and board text shared with the agent becomes model context. Closing the canvas is different from turning the feature off in Settings.

See Permissions, The browser, and Privacy.