See the icons right bellow 'Enable All' and 'Disable All'? Think of the first 4 icons as either tabs or drawers in a filing cabinet. Just bellow these icons, you'll notice folders. Clicking a tab/icon organizes mods into folders as follows:

• Organized by Enabled
  Two folders: one for 'Enabled' and one for 'Disabled' mods.
  
  
• Organized by Author
  Folders corresponding to each author you've subscribed to 3 or more mods.
  All other mods are placed in the 'Extra' folder.
  
  
• Organized by Update Time
  Folders for mods updated within a 'Week', 'Month', '3 Months', '6 Months', and
  'Over 6 Months'. Mods within these folders are also sorted by update time.
  
  
• Organized by Custom Folders
  This is where you'll find your own custom folders.

The 4 views described above all have one thing in common. Any 'Official Content' will always be in the top folder, and any 'WorldBuilder Map' will always be in the next folder. What differs is how each of these 4 views organize your mods.

There's also a 'User Guide' in Concise Mod Manager. Clicking the last icon to the right of the first 4 brings it up. It contains basic information on how left/right/middle clicking folders/mods works. As well as information on creating your own custom folders.




Encountered a bug? Trying to find out which mod maybe causing it?
[VANILLA BUGS] Click 'Disable All' to confirm or rule out it being a Vanilla Bug.
[MOD CONFLICTS] 'Organized by Enabled' groups all enabled mods in a single folder.
You could also narrow down your search with 'Organized by Custom Folders'.
[INCOMPATIBLE MODS] 'Organize by Update Time' helps with finding mods that aren't compatible with the most recent game update.

Want to better organize your mod collection?
'Organized by Custom Folders' allows you to make your own custom folders. This feature requires you to edit a file named 'CustomFolder.lua'. Don't worry, it's easy to do.
There's a basic explanation in game, it's further explained in the 'CustomFolder.lua' file.

How to make your own custom folders?
Short Answer: By editing the 'CustomFolder.lua' config file.
Don't worry, there's nothing to it.

Where to find the 'CustomFolder.lua' config file?
It's located in the following Steam subdirectory:
\Steam\steamapps\workshop\content\289070\1712085767

How to edit the 'CustomFolder.lua' config file?
You can use any text editor to open/edit the file. (Notepad++ is recommended)
The file you're editing will look something like the following:


Use what you see as a template for adding more folders and mods.
It's just a matter of editing the folder names and Mod IDs.
Concise Mod Manager's 'Generate Mod ID' button makes this easy.
Ctrl+A (Select All), Ctrl+C (Copy), Ctrl+V (Paste)

You can add as many mods in as many folders as you want.

The reason for this is that any Concise Mod Manager update will overwrite 'CustomFolder.lua', so make sure to have a backup. I recommend that when opening 'CustomFolder.lua' for the first time, save it as 'CustomFolder.lua.bak'. Once you've done this, go back to editing 'CustomFolder.lua' and save any changes to both files. This way if 'CustomFolder.lua' ever gets overwritten by a Concise Mod Manager update, just open 'CustomFolder.lua.bak' and save it as 'CustomFolder.lua' to restore your settings.

The vanilla game allows for mod groups, and Concise Mod Manager keeps this functionality. Mod groups allow for different combinations of mods and official content.
If you haven't used it yet, you'll see a drop down menu/bar that says (Default), with '▼', '+' and '-' buttons to the right, allowing you create/delete and quickly switch between groups.

You can take full advantage of Concise Mod Manager without knowing the following.

What are Steam App IDs and Steam Workshop Mod IDs?
A Steam App ID is a unique ID representing a Product or Application (App) on Steam.
A Steam Workshop ID is unique ID representing a Mod on Steam.
You'll find these unique IDs in Steam URLs and in Steam Workshop Mod directories.

Example:
Sid Meier's Civilization VI (Steam App ID) = 289070
Concise Mod Manager (SteamWorkshop Mod ID) = 1712085767
[Directory] \Steam\steamapps\workshop\content\289070\1712085767
[App] Sid Meier’s Civilization® VI
[Mod] Concise Mod Manager

Credit goes to eudaimonia. A very active coder who quickly updates his mods for compatibility with game updates, squashing any bug that may arise. He also brought us Concise UI and it's modular Collection of UI add-ons with a long list of features that make for a more pleasant gaming experience.

This guide is my way of saying thanks to eudaimonia and the community.