Sometimes you wonder if you can change a certain setting on your device but don't know what setting that is.

With this method you can find what setting does what very easily.

STEP 1 - LIST ALL SETTINGS

• Follow the tutorial here to setup ADB
• Open your command line and list all three system, global and secure settings using the commands available here.
• Copy the full listing to a new comparison in WinMerge

STEP 2 - CHANGE SETTING ON DEVICE

Change the setting you want to find on your device. In this example I toggled the Adaptive Brightness setting

STEP 3 - CHECK WHAT THE SETTING IS

• clear your command line with cls or clear or any similar command
• list all three system, global and secure settings again
  
• Copy the full listing to the second comparison window in WinMerge
  
• Press F5 to refresh the comparison
• The changed setting should now be highlighted

STEP 4 - CHANGE SETTING IN TASKER

• In Tasker, add the AutoTools Secure Settings action
• Go to Custom Setting
• In the Setting Type field select the type that you found corresponded to the setting that changed. In this case it was a System setting
• In the Name field write the name of the setting that changed. In this case it was the screen_brightness_mode setting
• In the Input Type you have to guess which to use. You can usually tell by the value the setting has already. In this example I know this is a toggle so I'll use the Toggle type. If one type doesn't work for you keep trying different types until it works.
• In the value set the new value for the setting. In this example I want to toggle it, so I'll set it to 3.
• Back out to Tasker, and run the task. The setting should now toggle!