If you want your aircraft to start at the end of a runway then you need to add some runway starts.

Background images are used to help layout airports.  These images are not photo scenery and ADE does not compile them into the simulator.  There are a lot of different types of background image that can be used.  These can be images taken from something like Google Earth or perhaps a published airport layout diagram.  The important thing is that these need to be in a recognized image format for ADE to use.  Also it is a good idea to keep the size of images as small as possible,  If you are working on a large airport then consider using several small images rather than a large one

There are two methods that can be used to select multiple objects

Sometimes folks get confused about the file format ADE uses.  If you have been used to working with AFCAD or with AFX you will expect to work only with the bgl file.  This is not the way ADE works

If you are working with aprons, ground polys, lines or fences then sooner or later you will want to add or remove a vertex.  Here's how