Permanently remove a canvas plane.
If you no longer need a canvas plane (for example, if you have finished sketching and exported the sketch image), you may want to delete it. (If you save a wire file that contains a canvas plane, the sketch image will be saved within the wire file, and the wire file may become significantly larger.)
To delete individual canvas planes
To select more than one canvas plane, hold down the key.
When a canvas is selected the pick icon turns red.
The selected canvas planes are deleted.