How to Cut a Model:
Sometimes you might need to cut a model by plane. Cutting a model by plane allows lowering the model.
This is how it works:
To be able to fulfil the operation, open and select at least one 3D model!
To cut a model by plane:
1. Click the 
button and hold the mouse button pressed.
2. Drag the icon up and down to cut the selected model by plane.
3. Release the mouse button.
The supports are automatically deleted after the model has been cut.
You can only cut models that consist of more than one layer.