Hymnal Block Lyrics... Centered but Left Justified?

In hymnals, after about the fourth verse of text, the rest of the verses will appear outside the staff in “block text,” i.e. Dorico’s text frames. Here’s the issue I have: I have the text left justified for ease in readability, but I want the actual text block to be horizontally centered on the page. Does anyone know how to achieve this, besides doing tedious manual adjustments to the frame based on the length of the longest line of text?

And no, locking the sides of the frame isn’t what I’m after, because if the distances I assign for left and right don’t precisely hug the text, the text will still hang as far left as it can.

Thanks!

No, there’s no automatic way to accomplish this. The new grid feature makes it easier.

As I feared. Thanks for the info!