Before you click "add" you must ask yourself where you want these verticies
So, getting out our notebook, we rough in four points (three if you
want a triangle). Undoubtedly, your models will have many possible
shapes and sizes, but for our example, we will create a small, simple square
that's 1000 editor units wide and 1000 editor units tall, and that is centered
on the (x,y) axis. Like this:
So, in editor units, our vertex coordinates (x,y,z) will be as follows:
Vertex 0 = (-500,500,0)
Now that we know the coordinates we will be using, goto Vertex>Add
The add vertex box will come up:
Now enter the values for each of the verticies you want to add (one
at a time). In our case it will be as follows.
After each addition, you will be prompted for confirmation.
Click Ok, and move to the next vertex. When everything is complete, click done.
Although you cannot really see them, the verticies you defined are now
added and available for use in BinEdit.