Custom labels are probably the best kept secret in Logos. You can turbocharger your highlighting and make your software much more powerful. Right now, I am categorizing the book of Proverbs based on the fruit of the Spirit with labels.

I created a custom highlighting style with labeling and two attributes: positive (which is a boolean true/false depending on whether the Proverb is a positive statement of what to do or a negative statement of what not to do) and fruit (which is a list: love;joy;peace;patience;kindness;goodness;faithfulness;gentleness;self-control). Whenever I highlight a proverb, it prompts me to select the right fruit from the list and then to mark whether it is positive or negative. Once I have done that, I can search for a certain attribute (label.FruitOfSpirit:fruit:kindness), an intersection with Logos's included tagging (label.FruitOfSpirit:positive:true AND proverb:form:"Synthetic Parallel") or anything else my imagination can come up with. In this example, I made a visual filter to color code them and to mark the positive ones with angle brackets >> <<. But the sky is the limit.
Here is my notebook (I am still very early in the process): https://flshare.net/m46na7
Here is my visual filter: https://flshare.net/o67ip2
Unfortunately, I don't think it is possible to share highlighting styles, but here is the setup:

If you have never used them before, give it a shot!