Holes Example
In this example, inner rings are enabled.
To allow holes to be created in SketchPro™,
enable the innerRings
capability in the sketch configuration.
{
"capabilities": {
"innerRings": {
"flag": "enabled"
}
}
}
When inner rings are enabled, an additional Cutter button will appear in the editor’s toolbar. The Cutter tool allows a segment to be cut with another segment, creating a hole in the former.

Segment with a hole
The SDS schema has some details around how inner rings can be used.
Sketch Data