[STUDIO] How Can I Clear One Page or a Few Inside of a Project?

To clear one page:

You can do this by just pressing CTRL and A, then press Delete (or right click in work area and pick "Delete".

You can also click "Clear Page" from the "Edit" drop down menu.

To clear multiple pages at once, you click "Edit" from the drop down menu and then pick "Clear Pages", then you can click the pages you want cleared, or click one of the hashtags at the top to pick specific choices.