You can leave a Space using the Options menu of that Space.
See: Space Options Menu
When you leave a Space, you go back to the invited state, and you can accept the invitation in the same way as above. You can also select and leave several Spaces at the same time.
See: Selected Spaces Options Menu
When you leave a Space, your status and properties in that Space are removed, so if you later accept the invitation again, you then see all the widgets in the Space as new.
- You Enter a Space when you, as a member of the Space, click on the Space's image in the home screen to open the Space screen.
- You Leave a Space when you cease to be a member of it.
- You become a member of a Space when you Accept an Invitation to it.
Therefore, leaving a Space is the opposite of accepting an invitation to a Space, not the opposite of entering a Space. The opposite of entering a Space is exiting the Space, or returning to the home screen.