Switch to the previous screenset. Previous means “current screenset minus one”. Next screenset means “current screenset plus one”.
I would like to be able to jump back to the most recently used screenset, but that’s just me.
Note: Screensets 1 to 9 can be recalled by freely defined key commands, not only the number keys on your computer keyboard. This allows you to use the number keys for other purposes, such as opening or closing windows. The 1 to 9 key commands are called Recall Screenset 1–9 in the Key Commands window.