Adjust the double-click speed
From Hamara Wiki
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.
- Open the Activities overview and start typing Mouse & Touchpad.
- Click on Mouse & Touchpad to open the panel.
- Under General, adjust the Double-click slider to a value you find comfortable.
- Click the Test Your Settings button to test. A single click in the window will highlight the outer circle. A double-click will highlight the inside circle.
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.