Find out cause of strange highlight in Vim

Question

I am using latexbox in vim for latex file editing. I found that some words such as "vertices", "Online" "i.e." are highlighted in light blue. Is there any way to find out the rule why Vim makes such strange highlight? I would simply want to disable it.

Answer 1

Finally find the culprit to the problem.

The strange highlight comes from the spell check of vim classifying my text as SpellCap.

To fix this I just need to use

hi clear SpellCap

Or you can change it to a less annoying color

highlight SpellCap term=underline cterm=underline

Answer 2

For this, the SyntaxAttr.vim - Show syntax highlighting attributes plugin is indispensable. It'll show you the syntax group under the cursor. You can then disable that (preferably in ~/.vim/after/syntax/tex.vim, using :syntax clear {group-name}).

Answer 3

To turn syntax highlighting off, just use this command: :syntax off.

You can find out, which syntax file is used for your file by entering :set syntax.

To get further help on this topic enter :help syntax.