the icon under the eyedropper will let you change the properties of an entity. Click the icon then select the entity, the right click and "Do it". here you can change sheet fill color, etc... to make something larger or smaller use the scale tool (look like a rectangle getting bigger, icon on the left). I am thinking about the cliffs, there are many ways to do them, and I think I'll need to draw one up and take a few screen shots.

I'll try and do it tomorrow.