Share Email Facebook Twitter LinkedIn X Functions Reference (AutoLISP) These AutoLISP functions all start with 'X'. Functions xdroom Returns the amount of extended data (xdata) space that is available for an object (entity) xdsize Returns the size (in bytes) that a list occupies when it is linked to an object (entity) as extended data Parent topic: Functions Reference (AutoLISP) Related Reference Functions Reference (AutoLISP)