Search
Draws skeleton wireframes around specified blocks through walls.

Range
Specifies the range in which matching blocks will be highlighted in. Blocks located further away from you than this value will not be highlighted.
Only Caves
Limits the module to only highlight blocks that have at least one of their sides exposed to air. This is good for UHC gamemodes, and is generally a good choice to help make your luck seem less suspicious.
Search Blocks
Specifies the blocks you want to highlight with the module. For more information, see the documentation for "Limit to Item" Settings.