fade panel
A fade panel (or transition panel) is a a special type of scene transition used in comics. It is named for the tendency of a gradient to be used to simulate a fade to black, white, or some other colored transition. Not all transitions will have a gradient, as this tag applies to all situations where tiny panels are used to transition into, or out of a frame.
For tagging purposes, these tiny panels do not usually make sense to apply towards the frame count. Sometimes they might count if they contribute to keeping the layout form intact.