Combine drawing outlines
Merge closed outlines, subtract one from another or keep their overlap.
Union, Subtract, Intersect and Exclude overlap combine compatible drawing outlines. The supported result may have more than one separate region or a hole. These are whole-object operations; they are different from drawing an edge across a face inside Reshape.
Select compatible closed outlines
Select the editable closed shapes to combine in the drawing. A command can refuse open, unsupported, locked or out-of-scope objects. More than two supported outlines can participate where the selected command permits it.
Choose the operation
Union joins the covered areas. Subtract removes cutting areas from a target. Intersect keeps only the shared area. Exclude overlap keeps regions outside the overlap. Use the current command or context menu for the selected objects.
Check subtraction order
The toolbar and object context menu order operands from bottom to top in the drawing, independently of click or selection order. Subtract cuts the objects above out of the bottom object. Use the drawing's front/back ordering controls to choose which shape is the base before subtracting.
Inspect all resulting regions
A valid operation can create more than one result region. Do not assume it always creates one simple polygon. If there is no usable result, the command reports or refuses that case rather than making every input pair succeed.
Undo or continue editing
Undo restores the sources after a committed operation. Select a result to continue editing its supported outline. Leave Reshape before invoking whole-object boolean commands.