idea uml class diagram view

Reference: https: //blog.csdn.net/s740556472/article/details/79876477

View achieve up, right -diagram-show diagram;

If you look at the relationship down: first the above operation, the implementation class input shortcuts (shortcut keys see what the keymap of implementation), will pop up a lot of sub-categories,

Then use shift or ctrl to select more than a few implementation class, there have been determined.