Metrics

In this app theres something very important missing. METRICS, in the app theres only three metrics available 4/4, 3/4 & 6/8, I wanted to make a song using 5/4,7/4 & 2/2 metrics, how am I going to do it if the metronome only have the three most common metrics?

Rene0023 about GarageBand, v2.2.2