You have two option:
Option 1
- Create the Arrangement Regions first and us the naming for the song sections from the popup menu when you click on the Region Name
- Now when you create a new Drummer Track it populates the Track Lane with Region following the song structure from your Arrangement Track
Option 2
- Create the Arrangement Region first and use the naming for the song sections from the popup menu when you click on the Region Name
- If you have an existing Drummer Region, right-click on its Track Lane and choose from the Shortcut Menu "Populate with Drummer Regions"
- Logic puts the corresponding Drummer Regions on the Track Lane following the exact song structure.

Please note:
- The Drummer has Drummer Preset files stored on your drive and when you populate a Drummer Track that has an Arrangement Region with one of those names (Intro, Verse, Choris, etc) it just loads the corresponding Preset into that place
- You can populate a Drummer Track even if you have Drummer Regions already on that Track. Logic will just "fill" the gaps with the corresponding Drummer Regions
- If you renamed an Arrangement Region (from "Intro" to "Beginning Section"), then the Drummer will remember its original name and load that Preset ("Intro")
- The other command from the Shortcut Menu "Create Drummer Region" creates a default 8-bar Region if there is no Arrangement Marker. If there is one, then Logic creates a Drummer Region starting at the click position to the start of the next Arrangement Region using the corresponding Drummer Preset based on the Arrangement Marker Name
If you look at the following system directory /Library/APplication Support/Logic/Drummer/Presets/ you will see in each subfolder (representing a Drummer) the Presets (extension .pdst) named after the song sections (Intro, Verse, etc). These are the files that are loaded onto the Track Lane Lane of a Drummer Track.

There are a lot of little details about the mechanics and the procedure around the Drummer. I explain them all in my book "Logic Pro X - How it Works" with unique graphics and diagrams, lots of information you won't find in any other book and especially not in YouTube video. It's not complicated, you just have to know about it and then you can really master those amazing features. "Understand, not just Learn"
Hope that helps
Edgar Rothermich - LogicProGEM.com
(Author of the "Graphically Enhanced Manuals")
http://DingDingMusic.com/Manuals/
'I may receive some form of compensation, financial or otherwise, from my recommendation or link.'