Okay, I am just begining here but I am trying to edit an stl to make it fit my purpose better. I am VERY close to having it work. I have split the part, moved the parts needed and am now trying to re-connect them. I have joined the objects and am trying to create faces to connect it back together. Almost all my faces have been easy. On occasion, I click on a vertex (is that the singular?) and it selects a whole bunch of others. So far in most cases, if I select my vertices in a different order, I can get the four desired points and make a face. I have a couple that no matter how I select the vertices I get all sorts of others. I am guessing this is a feature to allow me to grab an element (plain, section, group of points) and move/modify all as a unit. What I need to know is how to break that group of points (I think it is called a loop) so I can make the faces I need.