This question is probably answer many times on this forum, but I can’t find the answer to this specific situation. I’ve attached a model of at dining room table I’m building and about work on the joinery. If you look at the leg and feet components, you’ll see lines across the curved “face.” There were more, but I could simply erase them. For the remaining ones, when I erase, it opens a window in the curved face. Any suggestions??
Those edges are needed because the faces adjacent to them are not coplanar. You can make them disappear by soften/smoothing them. In this animation I used the eraser while holding the option key (on Mac, ctrl on Windows).