The Class tool window adjusts what it displays by what it perceives to be the current class scope. So, if your cursor is within a function that is in a class scope, it will show other members of that class. If your cursor is outside of a function (in global scope), it will show globals in the current file. If you right-click in the top pane of the Class tool window, there options for class exclusions. If you right-click in the bottom pane, there are options for auto-expanding. You may want to verify these things are set the way you want them.