The color of the display menu is selected by default. You can click Edit-Menu without canceling. . . "Set the color of the menu inside. This function is mainly used for coloring common menu commands, so that you can find these commands conveniently and quickly when you click them later. ?

By default, auto-collapse icon panels are not selected. You can select it, but this only works when the panel is docked and attached to the sidebar. You can try to paste the edge of the layer panel, click on the layer panel and edit the things in the layer. When you let go to do something else, the layer panel will automatically shrink. Its purpose is to save view space. ?

You can have a look at this painting.