when i use zoom extents command in ps layout flies way off into space and i cant get it back unless i undo. please help with limits or scale
There is probably something, a block or a line or another entity, far-far away from your page: Zoom Extents means just that, find everything and zoom out to include them all.
Try ERASE command and go around the edges with a window.
I have had this problem pop up on occasion - make sure everything is unfrozen and unlocked, so you can find whatever object is hanging out there.
also check for a wipeout w/ frame turned off. That has burned me in the past.
OP is your VP locked?