In the time slider select a key you want to move and just before it put you curser... then hit shift and left click then slide over to the right. The time line will turn red as you slide over. In the red areas you have little arrows, the outside arrows are for scaling and the inside arrows are for moving.
You can move or scale whole areas or one at a time.. i use this more than the dope sheet.
Hope that helps
Kurt
I am enough of an artist to draw freely upon my imagination, knowledge is limited, imagination encircles the world. (Albert Einstein)
https://www.artstation.com/kurtb