Once you have Voltage installed, venture into the stock Settings app and locate its preferences. Along with the obligatory kill-switch, you’ll find a format section that allows you to perform the aforementioned format changes based on variables.
Voltage contains a preference panel that allows you to use variables to format the way that the HUD overlay. Check out the following video walkthrough:
By placing two percent signs inside of the Format field, you can display the numerical value associated with the current volume. By adding three percent signs, you’ll get a percentage based value instead of a plain number. For the default Volume HUD behavior, simply leave the Format field blank.
That’s not all, Voltage gives you the ability to write aspecial messages that they want to appear alongside the numerical reading. Users also have the freedom to type in their own customized messages.
