How to remove "greyed-out part" after splitting a layer?

[marvelous_day1614]

I can split a shape layer with Command+Shift+d. However, when I try to split a video layer, "greyed-out part" appears:

 

Is it possible to split a video layer without the "greyed-out part"? If not possible, is it possible to remove the "greyed-out part" after the split?

This is very annoying for example because "Enable Time Remapping" creates keyframes at the very start and the very end of the current layer while respecting the "greyed-out part":

 

[nishu_kush]

Not sure if that's possible. If it helps, you can move the keyframes while holding down the shift key to snap them to the ends of the layer or to the Playhead. It makes it easier to move keyframes precisely.

Hope it helps.

Thanks,
Nishu