Click the mouse wheel
Even the most basic PC mouse should come with a wheel between the clickable left and right panels. Most often, it’s used for scrolling, but it can also double as a third button. Depending on the program you’re using, this can provide a quick way of performing an additional action.
The function of the middle button varies from one application to the next – the best way to find out what it does is to experiment. For example, in Windows, you can middle-click taskbar buttons to open a new window. This is handy if you have one Explorer window open and want to move files to another one.
You can middle-click Chrome, Edge and other taskbar buttons to open new browser windows, too. When you’re ready to close a window, hover over its button on the taskbar. When the thumbnails appear, hover over the one you want to close and middle-click it.
Most mice have a wheel between the left and right buttons, which often doubles as a third button