Doing a full compile takes a long time, and because of that, it’s handy to be able to check how much of the process is done and how much remains.
Luckily, when doing a full compile, the Compiler Output form appears at the bottom of the screen where you can see what is currently being compiled.

The only problem is that most of the time, the AX client hangs and is not responsive during the compilation process, so you can’t see that information.

The solution to this is to press Crtl + Break.
You will see a window that says:

Are you sure that you want to cancel this operation?
To start the Debugger for Microsoft Dynamics, press and hold SHIFT while you click No.

While this screen is active, the Compiler Output form will update so you can check up on the status. When you’re done, be sure to click “No” to resume the full compile. Don’t click “Yes” because then the compilation will not resume and you’ll have to start again.