Safari 3
In Leopard's Safari 3, page setup is now integrated right inside the print screen dialogue. (I can't test to see if this has also been updated for Safari 3 on Tiger (OS X 10.4), if someone can let me know, I'd very much appreciate it. Thanks.)
To print from Mint Printables using Safari 3 on a Mac, you can either click the print button I've supplied for you on the page (It looks like this: 
) of use File -> Print...
From there the print dialogue box, complete with a handy preview will pop up asking for your settings. (Yours will be a lot larger, I've resized the image down quite a bit so that it will fit this page properly.) If you are seeing a tiny box, make sure you click the arrow to the right of the printer choice so that it shows more options.
A look at Safari 3's Print options
Header and Footer: By default your browser may print the date and time, the address it was printed from and the amount of pages. In many cases you will want to remove that to avoid having the printable shrunk down. To remove that information from the final print, uncheck "Print Headers and Footers". This can be handy if the image you are printing needs that little extra space to avoid being resized down.
Remove Margins: Many of the printouts here at Mint Printables work best with the default margins removed. For the larger images this is necessary so that the the final product doesn't turn out to be a super tiny (and perhaps useless) printout. Depending on your printer manufacturer, you may already have a setting built in to remove the margins. With mine for example, I can simply choose the borderless version from the Page Size drop down list (Letter Borderless is the size I use).
If that doesn't work with your printer (settings often vary a lot between brands), try the steps outlined in OS X margin settings to set a custom page size, or visit the website for your brand of printer, they often offer tips and FAQ.
Print Settings: These may vary greatly depending on your brand of printer (I'm using Brother DCP-130c), but take a peek around. From the third drop down list on that screen that says "Safari" by default, if you choose "Print Settings" there's a whole slew of new options! If you're printing on anything other than normal paper, there may be options you'll want to look at. For example on mine, in the "Basic" tab's "Media Type" I can choose Glossy Photo Paper, then "quality:" list I can choose "Photo" or "Fine" when I'm trying to get the best possible quality print. Very useful when printing out photographs and even some greeting cards!
Here's a screenshot showing that part:
Firefox 2
I'm hoping this dialogue will be updated to be the same as Safari 3's new print options when Firefox 3 comes out, but if not, and for now, here's how to adjust the print options for Firefox 2.
How to Adjust the Header and Footer: As with Safari and most web browsers, Firefox will usually by default add information about the date, time, url etc. to the printed page, while this is usually helpful many printables sites try to squeeze as much onto your printable as possible so that it works out to be a better size in the end.
To remove this information, simply change all the drop boxes to say "(Blank)" in both the Page Headers and Page Footers. Here's a screenshot showing what I mean:
How to Remove Margins: The print dialogue box for Firefox is much different than Safari's, to remove the margins go to File -> Page Setup... Then choose your paper size (Borderless), then click OK. Letter size is the default setting for mine (8.5 x 11.0 inches) and Letter Borderless works well with the larger images here at Mint Printables. If your brand of printer doesn't have that option, try the steps for OS X margin settings to set a custom page size, or visit your printer's company website.
Important note! To print from Mint Printables using Firefox 2, click the print button I've supplied for you on the page (It looks like this: ). Printing using File -> Print... on Mint Printables will print the background page as well, not what you want ;). For printing at other sites, depending on their setup using File -> Print... should work most of the time.
Opera 9
In Leopard (OSX 10.5) Opera uses the same set up for printing as Tiger's Printed Page Setup, so head over to that page for the detailed description. I should note that Opera by default prints the entire page, not just the iframe in focus, so visitors here at Mint Printables that use Opera will have to open the images in a new tab and print from there. Sorry for the inconvenience but there's no way I can override the way Opera does this.