I'm sure topic of this question is quite confusing so here is a clearer explanation.
What I'm trying to do is to use clone stamp tool on a frame by frame basis to remove some elements. There is a lot of them so I will have many layers in Effects > Paint > Clone 1, Clone 2 etc. Each one of them is only needed for one or two frames and I was wondering if there is a quick way (shortcut for example) to set "out point" for that effect without grabbing them individually from the far right end and dragging it to the left.
I'm attaching an example of what I'm doing
I hope there is a simple solution to this as I will have hundreds of these and I would really appreciate some time saving magic.
Thanks a lot guys.
There is a list of keyboard shortcuts in the AE help documents.