If you simply remove a widget or menu item instead of graying it outthen it is much more difficult for your users to build an accurate mental model because they only knowwhat is currently available to them, and not what is not available.
If you simply remove a widget or menu item instead of graying it outthen it is much more difficult for your users to build an accurate mental model because they only knowwhat is currently available to them, and not what is not available.
如果你简单地移除一个窗体或菜单项目，而不是使它变灰，那么用户很难建立起正确的工作模式，他们只知道某些东西当前可用，某些东西不可用。