Do one of the following:
Choose Windows > Editors > Construction Plane Editor and click on the canvas name.
It becomes highlighted in yellow
In a [Paint] window, select the canvas from the pull-down list in the title bar.
Choose Layouts > All Windows > All Windows to see the modeling windows, select a brush, and start sketching on a different canvas.
Only one canvas can be active at once. This is the canvas on which new layers are created.
When a canvas plane is first created, it is active by default.
Only the layers of the active canvas are displayed in the Canvas Layer Editor. (See Windows > Editors > Canvas Layer Editor ).
Do one of the following: