Instructions
Find the objects you would like to clear. For example, if you need to delete all of the Scorpions on the map, find one you have already placed.
Select the object by pressing the "A" key.
Press the "B" key to open the special tools menu. Click "Delete all of these" and press "A' again.
Click "Yes" to confirm and remove all objects of that type from Forge World.
Repeat this process with each unique item type until the environment is clear.