The most important thing to keep in mind for this tab is that you can set both your default weapon settings and the settings for any weapon used in the scenario you are playing. You can change the weapon, customize its reticle, change the sounds the weapon makes, and more. You can even add your own custom sounds!
Note: Sounds should be in .ogg format and placed here (or equivalent install folder):
C:\Program Files (x86)\Steam\steamapps\common\FPSAimTrainer\FPSAimTrainer\sounds