If you want to visualize very clearly all the points (for example created from a division of a line), write on the command line:
DDPTYPE
For new versions: PTYPE
Disclaimer: this is a fast guide, a tutorial, an how-to article that I personally wrote for you. Feel free to write here any kind of suggestion! It is helpful if you need to solve your problem, if you need a tip or if you are in trouble and you need an help!