It's easy to delete a wall in the RoomSketcher App. Simply follow these two steps:

1. Select the item you want to delete. 
   
   
   
   
2. Click the trash symbol in the top menu or press Delete (Windows) / fn+backspace (Mac) on your keyboard.
   
   

Tip

Should the trash symbol be greyed out, although you have selected the wall, the wall is most likely locked. To unlock the wall, go to Properties on the right and toggle Lock off.