Personal workspace without named sandboxes

If you have access to a personal workspace but do not have the ability to name a sandbox, you do not see the Create and Delete Sandbox buttons and there is no area to list sandboxes since you always work in the same (and single) personal workspace.
You want to Personal workspace mode Sandbox
Always work in a private area and decide when to commit your changes to the server manually. You do not want to allow the naming of multiple sandboxes. On Off

When you have a personal workspace but do not have the ability to create named sandboxes, the toolbar offers Commit and Reset Data but no sandbox listing area:

Personal workspace toolbar with no sandbox

Since you always work in the same personal workspace, there are no sandbox names to list but you have access to Commit and Reset Data.