The "Create" button is labeled "Create Field" or "Create Param" depending upon the context. It may not be always be visible.

The "Cancel" button is now labeled "Close" to reflect the fact that actions initiated in this frame cannot be undone directly; variables are created and edited by calling the Variable Properties frame (Buttons N and Magnifying Glass). Variables are deleted (trash can) permanently after confirmation if they are not in use.

When the variable list frame is called as a result of the user choosing to create a variable field or table parameter, any changes made to variables are kept whether or not the user selects "Create..." or "Close". Selecting "Create..." associates the selected variable with a field or table parameter; selecting "Close" simply aborts the association but does not affect any changes made to variables.