Learn: Key bindings
M-s h .(hi-lock-face-symbol-at-point)- Highlight all occurrences of symbol at point.
M-s h r(hi-lock-face-buffer)- Highlight all occurrences of regexp.
With active region, read its content as input. M-s h s(my-hi-lock-face-string) custom- Highlight all occurrences of string.
With active region, use its content as input. M-s h u(hi-lock-unface-buffer)- Un-highlight at point.
Prefixed withC-u, remove all highlights.