A rabbet plane makes quick work of sizing a panel to fit snugly in the frame. The panel is not glued so it can expand and contract with changes in temperature and humidity. This Japanese rabbet plane works on the pull stroke.

A Japanese rabbet plane

Underside of a rabbet plane showing the adjustable fence.

A rabbet plane makes quick work of sizing the panel so it fits snugly in the frame.

This is a view of the panel inserted in the frame.