How do I display the chunk borders?
I can't display the chunk borders, even if I hit F3 + G. How do I get them to show up?
I know that sometimes you need to hold down the function key (Fn on most keyboards) for the F keys to work. Try Fn+F3+G.
Go into chat settings and disable reduced debug info.
It should re-enable the following:
- Chunk borders
- Bounding boxes
- Coordinates
- Block info
- Chunk info.
- Facing info.
- Client and server light info.
- Biome info.
- Sound info.
- Difficulty info.
And probably more.
Source
Maybe you have the lock key on. Try unlocking it by pressing fn + lock key (esc key) and then pressing fn + f + 3