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Undo Key - HP 35s User Manual

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Undo key

The Undo Key
The operation of the Undo key depends on the calculator context, but serves largely
to recover from the deletion of an entry rather than to undo any arbitrary operation.
See The Last X Register in Chapter 2 for details on recalling the entry in line 2 of the
display after a numeric function is executed. Press
an entry that you deleted
an equation deleted while in equation mode
a program line deleted while in program mode
In addition, you can use Undo to recover the value of a register just cleared using
the CLEAR menu. The Undo operation must immediately follow the delete operation;
any intervening operations will keep Undo from retrieving the deleted object. In
addition to retrieving an entire entry after its deletion, Undo can also be used while
editing an entry. Press
a digit in an expression that you just deleted using
an expression you were editing but cleared using
a character in an equation or program that you just deleted using
in equation or program mode)
Please note also that the Undo operation is limited by the amount of available
to recover:
while editing to recover:
immediately after
Getting Started


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