I agree, OSC. I personally had this same difficulty and was held-back by it for a few months of playing before I finally understood what some people on the forum were saying about finding it in the sidebar by typing the word, yet not being able to see those words as Tags in your Library Your Purchases screen. Like there was a thread where Riley said "They are tagged by the names" and people responded ala-Daniel L, looking in the Library and not seeing the name tags. I ended up going back to the Marketplace, re-discovering the items I had bought, and looked at the names -- so that's my hint for this when you use the sidebar. From then on, I could go to my Roll20 sidebar in-game and type the names, and it comes up. Before going back to Marketplace to look, I wasn't able to figure out the names it used (example: I expected it to be called "circle" but it was, in fact, tagged "round" not "circle" in the marketplace). Sure I could've gone through my library and hand-tagged them all "circle" if I wanted to find them under that, but what I really wanted was just to find the right token that I'd bought by a tag that's already on it from the marketplace origins & not to re-tag everything. Now that I know to remember the names-seen in the Marketplace, it's easier to remember what to type in the sidebar search, and then the ones you've purchased come up near the top.