Go View > Show Print view, so that you can see what will appear on each page.
- Set Content scaling using the slider at the bottom of the window so that the area you want to print fills the page.
- Select, then Copy the group of cells you want to print, open Preview, then press command-N or go File > New from clipboard. Print.
- Select, then Copy the group of cells you want to print, Add a new Sheet to your document. Delete the default Table that comes with the new sheet. Paste. Your selection will appear on the sheet as a new table. Position and sizeas you wish. Print the sheet.
- If you are going to print the same set of cells on several occasions, create a table to copy the content of that set. Move the Table to a separate Sheet, where it will continually update. To print, switch to the sheet containing the table. Print.
Barry gave you a very nice review of your options. A couple of comments.
I think the sweet spot for maximum benefit vs. effort is Barry's third option - adding a dedicated Sheet for printing a pasted range of cells. This way you have complete and easy control over size and placement of the cells on the printed page, and you can add titles, comments and formatting. I would only add that if there are equations in the copied range that reference cells outside of the selection, it's best to Edit > Paste Values, rather than to do a straight Paste.
If you were a former Excel user complaining about the lack of "Define Print Range" feature, I'd recommend the second option, even though I'd seldom use it myself.