1)No universal drop to floor. Read bulk change above. Other work around is to resample keyframes (to make less work) then click next keyframe arrow with one hand, Ctrl D with the other & step thru all the keys one by one. I've been bugging Larry W about adding this feature. 2)In AnimPalette drag arounf all beginning keys & delete. Then drag arounf end keys & copy & paste to the begining. I think also can svae pose over range of frames as well. 3)Uncheck Display/Guides/Ground Plane