Homerow computing: How to set Control+K => Arrow down?

Question

System: MacOS 12.x

How can I set up the following shortcuts:

• Control + k = ↓
• Control + i = ↑
• Control + j = ←
• Control + l = →

Paid third party software is ok, but should stay belo 10$.

Goal: I'd like to move the cursor around without leaving the basic typing position.

I've tried Automator, but

• the action becomes too delayed and
• presses like press control, k, k, k, release control won't work.

If I'd be on a Linux machine, I'd let Control+k, ... send arrow key keycodes via the keyboard layout file.

Answer 1

1. Install Karabiner Elements.
2. Import rules.
3. Open the Complex modifications tab.
4. Click Add rule.
5. Enable the rule called Change Control + i/j/k/l to Arrows.