Turn on bounce keys
Turn on bounce keys to ignore key presses that are rapidly repeated. For example, if you have hand tremors which cause you to press a key multiple times when you only want to press it once, you should turn on bounce keys.
Open the Activities overview and start typing Accessibility.
Click Accessibility to open the panel.
Select the Typing section to open it.
In the Typing Assist section, switch the Bounce Keys switch to on.
Quickly turn bounce keys on and off
You can turn bounce keys on and off by clicking the accessibility icon on the top bar and selecting Bounce Keys. The accessibility icon is visible when one or more settings have been enabled from the Accessibility panel.
Use the Acceptance delay slider to change how long bounce keys waits before it registers another key press after you pressed the key for the first time. Select Beep when a key is rejected if you want the computer to make a sound each time it ignores a key press because it happened too soon after the previous key press.