UCSICON Controls visibility and placement of the A Changes settings of all User Coordinate System Icon, active viewports graphically indicates the origin and orientation of the current UCS. The N ("NoOrigin") Displays the options normally affect only the current UCSICON at the lower-left viewport. corner of the viewport (i.e., not at the Origin) OR ("ORigin") Displays the UCSICON at the origin of the current UCS, if possible (if the origin is not within the current viewport, the location of the UCSICON defaults to the lower-left corner of the viewport) OFF Turns the UCSICON off ON Turns the UCSICON on UNDEFINE Deletes the definition of a built-in AutoCAD command UNDO Reverses the effect of multiple <number> Undoes commands, and provides control over the <number> of the "Undo" facility most recent commands in reverse order A ("Auto") Controls treatment of menu items as UNDO "Groups" B ("Back") Undoes back to previous UNDO "Mark" C ("Control") Enables/disables the UNDO feature E ("End") Terminates an UNDO Group (a sequence to be treated as one command) G ("Group") Begins an UNDO Group (a sequence to be treated as one command) M ("Mark") Places "marker" in UNDO file (for use with "Back")
UCSICON Controls visibility and placement of the User Coordinate System Icon, graphically indicates the origin and orientation of the current UCS. The options normally affect only the current viewport. A Changes settings of all active viewports N ("NoOrigin") Displays the UCSICON at the lower-left corner of the viewport (i.e., not at the Origin) OR ("ORigin") Displays the UCSICON at the origin of the current UCS, if possible (if the origin is not within the current viewport, the location of the UCSICON defaults to the lower-left corner of the viewport) OFF Turns the UCSICON off ON Turns the UCSICON on UNDEFINE Deletes the definition of a built-in AutoCAD command UNDO Reverses the effect of multiple commands, and provides control over the "Undo" facility <number> Undoes the <number> of most recent commands in reverse order A ("Auto") Controls treatment of menu items as UNDO "Groups" B ("Back") Undoes back to previous UNDO "Mark" C ("Control") Enables/disables the UNDO feature E ("End") Terminates an UNDO Group (a sequence to be treated as one command) G ("Group") Begins an UNDO Group (a sequence to be treated as one command) M ("Mark") Places "marker" in UNDO file (for use with "Back")