You can add objects by dragging them onto the map from the list on the right. Once you've added the objects you can move, rotate or delete them using the tools. You can edit your map on different levels using the level selecter on the bottom right. When you change levels a greyed out area will show you where you can add objects.

    Items can be interlocked by adding the item you want to interlock on top of the first one. You can also interlock objects with the map using the same method. To find out how to interlock in the forge check this tutorial out.

    Underneath each item on the list is the item limit counter, use this to plan your maps so you don't go over the limit. Also, adding items uses up your budget just like in the forge. You can enable the unlimited budget glitch in the settings or when you've used up the budget. The budget will continue to count even with unlimited budget allowing you to turn it of again. To find out more about the unlimited budget glitch have a look at this tutorial.

    In the settings you can enable a grid to help you place objects easier. Also by pressing number 1-5 you can change the tool, pressing escape will change back to no tools. Holding control and pressing 1-4 will change to that level.