Tap your touchpad
If you have a laptop with a touchpad and no buttons, it will respond to one, two and possibly three- and fourfinger taps. Tap with one finger to simulate clicking the left mouse button and tap with two to produce
the same effect as a mouse’s right-click. Pushing up or down the touchpad with two fingers is like spinning the wheel on a mouse, which is useful for scrolling through web pages and documents. Slide two fingers left and right for horizontal scrolling.
These are the standard gestures and your computer’s touchpad may allow more, depending on its make and model. A three-finger tap can open the Cortana/search box in Windows 10, while a four-finger tap might launch the Action Centre. Open the Control Panel, switch to the small icons view and see if you can find anything related to the touchpad, such as Synaptics Clickpad. Open it to see demonstrations of the possible touches and taps, and to enable or disable gestures.
Check the touchpad’s taps and swipes for middle- click and other gestures