label: DevExpress, BarManager, Menu cannot be displayed
Phenomenon: The program can run normally, and the data is correctly assigned to BarManager, but a menu can not be seen.
Cause: BarManager uses DockControls, and the Size property of any DockControls is greater than the resolution of the currently running computer.
Solution: Modify the Size property of DockControls to ensure that the modified value is less than the resolution of the computer.
Optimization: You can shrink the form to 800*600 and then set the form to maximize in the Form_Load event.