Adjust the double-click speed
Double-clicking only happens when you press the mouse button twice quickly enough. If the second press is too long after the first, you'll just get two separate clicks, not a double click. If you have difficulty pressing the mouse button quickly, you should increase the timeout.
Fare clic sull'icona a destra nella barra dei menù e selezionare Impostazioni di sistema.
Click Mouse and Touchpad.
Under Double-Click Timeout, adjust the Timeout slider to a value you find comfortable. Use the smiley face under the slider to test your settings. A single click will make it smile. A double-click will give it an ear-to-ear grin.
If your mouse double-clicks when you want it to single-click even though you have increased the double-click timeout, your mouse may be faulty. Try plugging a different mouse into your computer and see if that works properly. Alternatively, plug your mouse into a different computer and see if it still has the same problem.
This setting will affect both your mouse and touchpad, as well as any other pointing device.