Here's the method I came up with to overcome the lack of an Add Edge tool in trueSpace 3.2.
There's a few steps to it, but with it you can add edges between the vertexes you choose.
Just six small images with captions so it'll load fast on dialup.
The procedure works on faces with any number of sides, you just have to remove edges in the right order after beveling.
Single face triangulation in trueSpace 3.2