[soylentcola]

In addition to the spyglass icon, if you are facing a chest/item that contains materials you've marked, they have a blue "glow" overlay that makes them stand out. Pretty sure that's part of the base game since the only mods I've installed are one to add more songs to Diamond City Radio and one to tweak lighting and improve ambient occlusion (just basic post-processing tweaks). Don't think the blue glow on tagged materials is part of either mod.

[lfowles]

That sounds like level 2 of the scavenging perk in the INT tree. Level 1 was finding screws and uncommon materials when scrapping guns, level 2 is finding rare materials when scrapping guns as well as highlighting tagged components in the game.