I'm a math teacher. I like to use Blender to demonstrate some ideas when we talk about geometry in 3 dimensions, so I display it on our projector and the class will work together to edit some basic shapes. I've changed the size of vertices so they are bigger and easier to see, but I haven't found a way to increase the size of edges. Is there an option to do this?
Although if in edit mode and your creating a whatever.... Yes the vertices can be made to thick. but, the edges cannot. There is a way to help though. Go to user preferences and increase the scale of the display. look under interface, then display. Increasing the scale, or zoom make it appear that the edges are thicker. in reality its the same size but, when its scaled to sale 105 or more the edges are a lot thicker looking. and easier to see and it really doesn't effect the work area field of view.