2. Highlight the blocks you want

First, open a set's configuration file:

data\blockhighlighter\tags\blocks\s0-8\blocks.json

e.g.: "data\blockhighlighter\tags\blocks\s8\blocks.json"

Then, you will see the block names inside the "values" array:

"minecraft:chest",
"minecraft:trapped_chest",
"minecraft:ender_chest"

Next modify those values to the blocks you want like this:

"minecraft:diamond_ore",
"#blockhighlighter:s4/blocks"

In addition, you can do "multi-casting". Just don't do "self referencing".

Last reload the world.