Next: The Redo Button: Redo
Up: The Edit Menu: Modify
Previous: The Cell Properties Button:
Contents
Index
The Undo Button: Undo Operation
The Undo command reverses the operations performed in the
current cell. These operations can be undone as long as the present
cell is the current cell. Undone operations can be redone with the
Redo command. Pressing the Tab key has the same effect as
clicking on the Undo button, and Shift-Tab is equivalent
to Redo.
By default, the last 25 operations can be undone. This can be changed
with the variable UndoListLength, which can be set to a
non-negative integer with the !set command. This sets the
number of operations that are remembered. If set to zero, the list
length is unlimited.
When Xic is waiting for text input to the prompt line, the Undo and Redo commands are disabled.
Stephen R. Whiteley
2006-10-23