#Offset

Builds an outline at a given distance from the selected one. The distance is in the top bar.

#Where it is needed

• A wall: you have the outer outline, the inner one is an offset inwards by the thickness.
• Stock allowance: the part outline and the blank outline around it.
• A groove along a path: a centre line and two offsets by half the width.

#About inner corners

Offsetting inwards either rounds a corner or makes it self-intersect — that is a property of the operation itself, not of the program. If the outline looks tangled after an offset, reduce the distance or split the outline into stretches.

#A hint

For an even wall over the whole body the Shell command in the Part workbench is usually better: it works with the body rather than a flat outline and handles all faces at once.