When deleting an area, you can choose to leave the objects it holds on your canvas. Or, you can delete everything inside the area too.
To delete an area:
Right-click on the area.
Click Delete in the context menu.
Select either Area only or Area and content.
Tip: To quickly delete an area, click the area to select it. Then, press Delete on your keyboard. You’ll still be able to delete either the area or the area and its content.
For more on areas, check out these other articles: