What key command do you use to undo an action in Revit?

In Revit, the key command used to undo an action is Ctrl + Z. This command is a standard function found in many software applications, allowing users to revert their last action, which is especially useful when making changes or adjustments to a project that may not yield the desired outcome. Utilizing this command helps maintain workflow efficiency, enabling users to quickly correct mistakes without extensive manual rework.

The other options serve different purposes in Revit. Ctrl + S is primarily used for saving work, ensuring that changes are preserved. Ctrl + Y is typically associated with the redo function, allowing users to reapply actions that were previously undone. Ctrl + A is a command for selecting all elements within a project or view but does not perform any action related to undoing changes. Understanding the specific functions of these commands can greatly enhance productivity while working in Revit.