Sliding - but to the center of the address label!

[Slater]

Hi Everyone,

So here's one that's either really easy and I've missed it, or it can't be done!

I'm printing address labels, and the 7 rows that I'd like to print take up the whole label layout, and so the first one is located at the top of the label in the layout, and the bottom one is at the bottom of the layout. If the label only has 4 rows, then those 4 rows are printed at the very top of the label. To make things pretty, I'd like to have them centered within the label. 

Is it possible to have the block of text center itself, so that there is the same amount of blank space both above and below it, rather than having all of the space below it?

Many thanks in advance!