About Slime Chunks Feature

[NightSharp]

I've noticed that jm-additions can show slime chunks on the map.
But those chunk marks still remain on the map even though I leaved those areas, which makes the map fulfilled with green marks, a little bit bad-looking.
Is it possible to add an option to let the slime chunks only show in the detection range?
And also to let the mark and its text "Slime Chunk" in full-screen map can be customized, toggled or localized?