Pierre,
I understand you but, as you know, Slip and Slide tools act on non-adjacent frames. I spoke only for that two tools, of course.
Slip tool changes the In and Out point of the middleClip (leftClip-middleClip-rightClip).
Slide tool changes the OutPoint of the leftClip and the InPoint of the rightClip (leftClip-middleClip-rightClip).
Then, your/our focus should be in the frames that were changing, I think (and if possible to implement that).

Others NLE split the Compositor to four views: two "great" views face to face (like now in Cinelerra-GG), more two little views above the two greater views. The two greater views show the frames that change, the two little views show the frames that doesn't change.

IgorBeg


Il 02/02/2019 15.42, Pierre autourduglobe ha scritto:
As for the Slip tool and the dual display of the clips of the cut in the composer, I believe that it is necessary to maintain a constant behavior between the different modes; the dual display shows each side of a cut. To change the display as you propose in this case, I think it should be an applicable option by pressing the "option" button.

Pierre