System Centering or Aligning along the right hand side

Hello,
I'd like the systems of my score to be centered, and other times aligned along the righthand side (like a word document). The problem is, a system that has only 2 or 3 bars always stretches from the left side of the page to the right. I'd to be able to resize the 2 or 3 bars to fit nicely in the center of the page or along the right hand side. Is this possible using MuseScore?