I would like to be able to replace something with what I already copied before, it would speed up my work a lot.

I select the element that I want to replace and replace it with what I have already copied.

This prevents you from having to do these repetitive and unnecessary tasks:

1. Paste the new element (Ctrl + V)

2. Place it where it should be

3. Delete the old thing that I no longer want.

If I could also have a keyboard shortcut, I would do everything much faster. For example: Ctrl + Shift + R.