Time Signature Picker

You can change the time signature of the current song by tapping on the time signature button in the upper left corner of the metronome.

Swipe up and down to adjust the number of beats and beats per measure. The time signature will change on a running metronome. You can also tap on the play/stop button to toggle the metronome playback as well.

When you are done selecting the time signature. Tap on menu beneath to hide the picker.