You can set the following preferences in the category of the window.
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Select On if you want to be able to undo operations. This is the default.
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Select Infinite to perform an unlimited number of undo operations. This option can use a lot of memory. Select Finite to limit
the number of undo operations you can perform (specified in the box). The default is Finite.
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If Finite is the selected Queue setting, specify here the number of undo operations you can perform. The default is 50.
