Cherokee_Cruiser
Bronteroc
Or reset the cruise alt in the prog page. Watch the speed though (likes to slow down). Pro tip: entering any single digit in LSK 1L will set the cruise alt to whatever is in the FCU! No idea why...
Entering a number at/below current altitude should lock in your current altitude on CRZ prog page.
You can also re-enter the temp on the Perf page for it to recalculate. If anyone can tell me why the plane wants to scream down after leveling off and capturing the first altitude when descending on multiple altitudes. It thinks it's high and the hockey stick never readjusts.
Yes, things changeable on the Perf page will also re-define the descent arrow/TOD. Anything that gets the FMGC to "think" will redefine the vertical profile.