How can I make a legend for highliting a work?
I use a note - there is no specific tool or standard for this.
If by "legend" you mean a reference as to what each color means, you can do this in the Highlighting tool.
Look at the image below.
When I'm preaching through an epistle I always assume that there will be Cautions, Doctrines, Exhortations, and Facts. Notice that my highlights are currently pointing to the Philippians Sermons notebook. Now when I turn on Epistle Highlights in the Visual Filters menu, these colors will appear in Philippians. The Highlight Tool itself tells me what each color signifies.
In my hard Bibles I use this system:
Green = anything related to new life or Christian growthBlue = commandsYellow = The Holy SpiritRed = JesusPurple = God the FatherBrown = Doctrinal statements/truthsPink = LoveOrange = SinDark Green = PromisesI was introduced to this way of marking my Bible by my pastor. I want to do this in Logos while underlining and taking notes.
If you want to retain your system and have a legend, just do with @Gregory did. Create a highlight palette and name each style with you text after the = sign (or use an abbreviated version for the longer one). If you want to use the default palettes, then just put this key in your notes.
I have created a number of legends like this. I have a notebook called "THV Logos Guide," that houses all the tips, tricks, howtos, and methodologies I have for doing a variety of things in Logos. One note explains my notebook system, one explains my tagging system, one explains my notes color-coding system, one explains how I use the note icons.
So, with these you have two very good ways of creating your legend. For highlighting, I would lean toward @Gregory's method because it will be right there in front of you when you use the palette. More importantly, if you ever run a search of all your highlights of a particular type, you won't be searching generically for "Brown," but for "Doctrinal Statements." Then, your search is even self-documenting. That's pretty powerful.
Tom, where can I find your logos guide? Is it public?
I'm sorry, I was just using that as an example of how I keep track of my system and suggesting it might be something that you want to do. The notebook is not public, but I wouldn't mind posting screenshots from it that would be interesting/helpful to you.
Yes. Thank you for all your hardwork.
Perhaps the term "Palette" is what Faithlife uses to describe what you are calling a "legend"
Palettes can be duplicated and each palette may be directed to a specific notebook.