I explain myself in this youtube video with the visual. I have a vert that will not let me drag it to another vert. I hope the video helps make it obvious what I am doing wrong so you can tell me. I successfully merged many verts together. But these two will not get close to each other. sketchup vertice merge issues - YouTube
You might try the alt key to auto fold. Hard to say without the model.
Shep
Thank you. I held down command vs alt. I’m on a mac. Worked like a charm. I also watched my first tutorial on autofold. I’ve watched about 20 beginner videos but missed that one.