Rotation icon - can this be in 90º increments?

GoJS
1

Rotation icon - can this be in 90º increments?
Rotation Icon can be incremented Or decremented by 90º?
Like gojs context menu rotation action in node.

2

Yes. Please read GoJS Tools -- Northwoods Software.

3

Can it be directly incremented 90º?
When rotation by handler.

4

Yes, as documented at RotatingTool | GoJS API, just set RotatingTool.snapAngleMultiple and RotatingTool.snapAngleEpsilon.

5

Thanks a lot.