Insert into restricted area

I'm not sure I understand what you want to achieve. If you want to have part of the frame fixed with an image while the rest of the frame (the left and right parts) are video, there are two easy ways to do this: place the image in a track above the video track and adjust it either with the “Projector” tool or by scaling the image size (i.e., its track) to the desired dimensions. The image will always remain fixed in the position we have set, while the rest of the video will play normally.

I mean the timeline.

With "left" and "right" I meant before and after a certain space / area.

Let me simplify and say:

• we have a new video track
• there is space / area from second 10 to 15 (so 5 seconds in length)

I want to drag anything (e.g. an image) into that 5s long area so it fits right into it (time crop).

What I have already tried:

• Double-click at edit mode and then drag in
• setting In and Out marker and then drag in

If that works then a more advanced step would be to directly insert into a gap of a populated video track with content before and after - without doing any harm (overlapping or pushing away).

Sorry, I didn't understand. So you don't want to move the edits to the right of the empty space. I don't think it's possible to do that directly. One option would be to calculate the exact length of the empty space in seconds (not in hh:mm:ss:ff) and then go to Settings-->Preferences-->Interface-->Import images with a duration of... and set the exact number of seconds for the empty space. Finally, load the image into the Viewer window, set the In/Out points at the beginning and end, and proceed with an overwrite (B). It should fit precisely and not affect the following edits.

That's a good idea with the overwrite function key.

I'm mostly using the mouse because I use cin to seldom to remember the shortkeys.