Change metronome to just click on beat 1 of 3/4 time during playback.

At fast tempos it would help to have the metronome click on beat 1 only. I have accomplished this by changing the time signature in some cases. For example in 4/4 time I change the time signature to 1/1. But I can't see how to do that with odd numbers like 3/4 time. This is not a good solution because it changes the appearance of the music.