Define the physical baseboard footprint so the planner can warn when a piece overhangs it.

The baseboard

A baseboard is the rectangular footprint of the table or board you'll actually build the layout on. Defining one is optional, but it unlocks a few things:

A visual outline on the canvas showing your physical limit.
An "off-board" warning when a placement extends past the rectangle.
The minimap anchors its scale to the baseboard instead of the placement bounding box, which is steadier when you're still planning.

Setting one up

You set the baseboard when you create a layout. Every way of starting a new plan — the New layout button on your home page, the layout switcher, and the command palette — opens the same New layout dialog, which asks for a name first, then its width and depth in centimetres — 200 × 100 reads more naturally than 2000 × 1000 mm for a board-scale bench. (In imperial units the dialog asks for inches instead.) The values are stored in millimetres under the hood, so snapping and geometry stay millimetre-precise. The rectangle is centred at the layout origin and drawn underneath the track.

Existing pieces don't move if the baseboard changes — only the warning state updates.

Board colour

The baseboard is drawn in a wood or neutral tone you choose. Both the New layout dialog and the layout-settings popover (the cog next to the layout name) offer a row of preset swatches — oak, walnut, pine, and a few cool neutrals — plus a custom-colour swatch (the colour-wheel tile) that opens your system colour picker for any hex you like. The board recolours live as you pick, and the choice is saved with the layout.

What "off-board" means

A placement is flagged off-board when any part of its spline crosses outside the rectangle. Off-board pieces are tinted amber on the canvas so you can see them at a glance, and they're also listed in the Validation panel ("Piece off baseboard"). The flag is informational, not blocking — you can keep building. It's there so you spot mistakes early instead of discovering them with a tape measure on the day you start cutting wood.

Leaving the baseboard unset

If you don't set a baseboard, the planner assumes "unbounded" — no warnings, no rectangle, no off-board flag. The minimap falls back to anchoring on the layout's own bounds.

That's fine for sketching ideas. Set a baseboard once the plan is close to something you'd build.