"DND_TAH_AppStatus" is a KM Variable. See that link for a good overview with examples of how to use.
The name of the KM variable follows my naming convention, which gives me a lot of info in a quick glance:
- The "DND" stands for "Do Not Delete", which means that you should NOT delete this variable in the KM Preferences Variables tab, or elsewhere. It is needed by the current macro, and maybe by other macros.
- "TAH" stands for "Toggle Activate Hide", which is in the name of the macro. This helps give the KM Variable a unique ID associated with a specific Macro.
- "AppStatus" is, of course, just a description name for the Variable, indicating its contents.
- The "__" double underscore prior to the "AppStatus" means than if you were to use this in a Prompt for User Input, only the "AppStatus" would show, making it easier to read.
If you have not done so yet, I recommend going through this checklist:
Getting Started with Keyboard Maestro
- Read the Quick Start.
- This is essential to become familiar with KM terminology
- Do the tutorial (Help ➤ Tutorial) in the KM Editor.
- Gives you a live walkthrough of creating a macro in the KM Editor
- Review/Browse the Available Macro Actions
- For Help with an Action in your Macro, click on the gear icon
at the top right of the Action, and select "Help"
- Search the Keyboard Maestro Wiki for detailed help.
- Start small, and grow your macros organically.
- Be prepared for some trial and error in the beginning.
- Make good use of this Keyboard Maestro Forum
- Search for existing macros
- Post your questions/issues if you get stuck
- Be sure to first read: Tip: How Do I Get The Best Answer in the Shortest Time?