grow shrink font/spelling and grammar check a paragraph

I am trying to make the transition from MS Word to Pages. So far there are 2 things I can't figure out how to do as I could on Word. Word has a grow font and shrink font command. So if I have a document with fonts at say 12, 14 and 16 size I could highlight the doc and shrink font 1 point and they would become 13, 15, and 17. This made it easy to edit a document of various font sizes to fit on a page. Is there a way to do that on Pages?

Also is there a way to highlight a paragraph within a document and check just that paragraph for spelling and grammar?

I used both of these features a lot on Word and would like to know how to do them on Pages if possible.

Thanks!