If you want to completely delete a button, it is quite simple to do so.
This procedure will work to delete any page object you have drawn in error, including buttons, hotspots, folders, tab controls, message windows, vocabulary grids, and videos.
1. First, get into Edit mode by selecting the Edit button in the upper right corner of the page.
2. Select Edit Page.
3. Select the button you want to remove.
4. Begin dragging the button. A trash can icon will appear at the top-middle of the screen.
5. Drag the button to the trash can to delete it.
6. Select Save.