Quick CATIA Tips: Increase the number of Undos

Did you know that you can control the number of times CATIA will let you hit the undo button? This is a good tip if you are dealing with a large or complicated part model. The default number of undo levels is ten. In some cases it can be very useful to have a few more, but do remember that this will hog system memory so show restraint when altering this setting. Here's where the option is located:
R16: Tools > Options: Select General > Performances.
R18: Tools > Options: General > PCS