Different measures in song

Hi there,

I'm using MuseScore 2.0.0.
I would like to write a score which consists of two different measures. One is 4/2 and in the middle of the score it changes to 3/2. I know that I can change the measures by dragging it into the score, but this only works for the pre-defined measures (2/4, 3/4, 4/4, 5/4, 6/4, 3/8, 6/8, 9/8, 12/8).
Is there a way to change the measure from 4/2 (score default measure) to 3/2 for all remaining bars?

Best,
Tom