Edit ‣ Undo is used to reverse the last change you made or operation you performed in Kdenlive. If you have made multiple changes to your project, Undo can be used repeatedly to rollback each of the changes in the reverse order they were performed. Undo can also be executed from the icon on the Extra Toolbar (Settings ‣ Toolbars Shown) or by using the default keyboard shortcut Ctrl+Z.
To view a navigable list of all the changes which can be undone, see Undo History.
Edit ‣ Redo reverses the previous Undo operation. The default keyboard shortcut is Ctrl+Shift+Z.
Copies a clip selected in the timeline to the clipboard. The default keyboard shortcut is Ctrl+C. It also copies the effects attached to the clip to the clipboard. Use Paste to paste the clip into a different spot on the timeline. Use Paste Effects to paste just the effects from the copied clip onto a different clip or group of clips.
Pastes an existing clip in the clipboard into a different spot on the timeline (where the playhead is, to be exact). The default keyboard shortcut is Ctrl+V.
You need to have selected a clip and copied it first. Then select another clip or a group of clips. Paste Effects then pastes just the effects from the previously selected clip to the newly selected clip or group of clips.