Have you ever wanted to insert multiple frames into the time line to extend an effect for multiple objects?
After some searching in the help manual, I found that it is possible. To insert multiple frames, use the right mouse button to select the position and number of frames you want to insert. On releasing the button you are presented with the context menu which allows you to Insert (or Delete) multiple frames.
The video below demonstrates this process. Note that the mouse click and drag is done with the right (not left) mouse button.