How to speed up the left and right arrow keys for editing text? [closed]
To change how fast a key repeats when holding it down, adjust this setting:
"System Preferences" -> "Keyboard" -> "Keyboard Tab" -> "Keyboard Repeat"
To change how long you have to hold it down before it registers as repeating, adjust this setting:
"System Preferences" -> "Keyboard" -> "Keyboard Tab" -> "Delay Until Repeat"