Thanks Dave, yes it was simple and I thought I new the solution (highlight all hold, alt key before grabbing end frame and continue to hold whilst dragging) but for the life of me it didn’t seem to work the other day … go figure. I was also having problems creating a new keyframe (in case anyone else is reading this) … I moved a layer and ALL other keyframes moved … I really thought something was seriously wrong … but I’d “separated dimensions” to use the graph editor, rejoining them solved that little glitch … and I am Mac Yosemite but not CC .. I’ve stuck with CS6 (don’t get enough work to warrant the expense) !
Roger