Choose Start with spaces, arrange named Spaces and resolve their boundaries, then use Build plan to create ordinary editable walls and rooms.
Press W, click where the wall starts, click where it ends. Each further click continues the chain, and clicking back on the first corner closes the outline.
Start drawing, then type the number. It goes into the Length field of the readout by the cursor, and Enter places the point exactly there.
Press V for the select tool. Click to select, drag a box for several, drag to move, arrow keys to nudge, Delete to remove.
The cursor is pulled to real geometry first — endpoints, corners, intersections, midpoints — and falls back to the 100 mm grid. G toggles the grid, Shift locks to 45°.
Every key the Gridsnap editor uses — tools, editing, the numeric tracker while drawing, and moving around the 3D view.
Without an account, plans live in your browser and autosave as you draw. Nothing is uploaded unless you sign in and sync, or make a share link. Export the Gridsnap file for a real backup.
A mouse wheel zooms, a two-finger trackpad drag pans, and a pinch or ⌘/ctrl+scroll always zooms. If your device is read wrongly, set it by hand under ⚙ → Navigation (this device).
Open the editor. Draw the first wall.
No download, no account, no watermark. Your plan is measurable, printable and shareable from the first click.