Using vertical alignment in pages for Mac
Hi, I am using an Imac MacOs Mojave 10.14.3, and Pages version 7.3.
I am trying to produce a catalogue whereby the text is aligned vertically on the page. I want to lock the text in so that it appears at the bottom of the page (so the text starts quite near the bottom) and when I subsequently want to add text I want the bottom line of text to remain in place and the top line of text to move up as I type. If I go into format - body - alignment I can align the text left and right but the vertical alignment buttons are greyed out. They remain greyed out even if I highlight the body of text I want to align.
At present I move the text down manually by pressing the return button until the bottom line of text moves to the next page, I then go back and delete the first blank line above the text to bring the body of the text back onto one page. As you can imagine a very laborious process. There must be a short cut but I just can't find it.
Any help would be gratefully appreciated.
Thank you.
Any suggestions
iMac 21.5" 4K, macOS 10.14