is_redo_available

Check redo system availability

is_undo_available

Check undo system availability

is_undo_off

Is undo system off

is_undo_stopped

Is undo system paused

redo_add_bos

Store an entity in  the redo queue

redo_add_command

Store a command in the redo queue

redo_get_description

Get a description of the current redo command

redo_one

Execute Edit > Redo

undo_add_bos

Store an entity in the undo stack

undo_abort

Abort or invalidate the current undo stack

undo_add_command

Add a command to the undo stack

undo_begin

Begin recording commands, or start new nesting level

undo_end

End recording commands, or end nesting level

undo_get_description

Get a description of the current undo command

undo_get_limit

Get the undo stack size

undo_initialize

Initialize the undo system for a program

undo_log

Add a string to the undo logging system

undo_log_close

Close the undo log

undo_log_open

Open the undo log

undo_off

Turn off the undo system

undo_on

Turn on the undo system

undo_one

Execute Edit > Undo

undo_restart

Stop and reinitialize the undo system

undo_resume

Restart the undo system after suspending it

undo_set_description

Set the description of the current undo command

undo_stop

Stop the undo system

undo_suspend

Suspend or pause the undo system