Question

When you insert a blank keyframe, the images in the previous frames will be visible on the stage.

true or false

answer fast

Answer 1

false, it will only create a frame with a blank Stage. (Previous frames will only be visible on the stage if the frames are Static frames)

Answer 2

In editing and animations, one works with frames to organize and control the content of your document.  

They place the frames in the timeline in the order in which the objects in the frames may appear in the finished content.

Keyframe

One can also add a blank keyframe to the timeline as a placeholder for symbols and also plan to add later or to explicitly leave the frame blank.

Using keyframe one can set a position, add anchor points, actions, comments, and so on.