When printing multiple copies the font changes to nonsense

You can try a work-around it by copying the text into another program like Word or WordPad, adjusting the fonts and then printing.

in text editor source printing if U can not change font tipe and size copy text in wordpad or libreoffice and edit text then print

Do you also get the same font size result when making a copy using the Copy button from the printer operator panel?
It could be due to the print setting on the application that you're printing from. e.g. If you are using Word application, go to File > Page Layout > select Fonts and choose your preferred font size.

IF YOU RIGHT CLICK YOUR MOUSE YOU CAN SELECT COPY ALL THEN PAST INTO MICROSOFT WORD THEN CHANGE THE FONT SIZE OR YOU CAN SELECT PRINT CHANGE PRINTER TO ADOBE CONVERT TO A PDF THEN PRINT

Copy your email to MS Word or similar. Adjust font size and print from there.

Best Answer -
That entirely depends on what you are printing. A printerwill only produce what it is given.

If you are printing your own document then you change the font in the documentbefore printing or select the font before you start.

However I suspect the reason you are asking this is because you are printing apdf document from the internet. In which case the font is fixed.

If so, then you will have to copy and paste the document in to a word processorlike Word, highlight it all and the increase the font. You will then have toreformat the whole document as the increased font will throw the orginalformatting all out of line.

When you have straightened it all up then print it off.
ALTERNATIVELY, if you are printing on ordinary web page then you need to follow the below instruction
Instructions
1. 1 Go to theweb page that you want to print and right-click it. Click "PrintPreview." If you want to print part of the page, highlight the contentthat you want to print and right-click the selection. Click "PrintPreview." 2. 2 Click the "Page Setup" icon located onthe top of the Print Preview window to launch the Page Setup dialog box. Click"Change Font." 3. 3 Select the font you want to use in the"Size" window. If you want to change the font type, make yourselection in the "Font" window. Click "OK" to save thechanges and click "OK" again. 4. 4 Turn on your printer if it is not on. Click the"Print" icon on the Print Preview window to print your web page.

I assume you mean that you can print from Outlook or other e-mail program (Outlook Express, LiveMail, Thunderbird). Are you reading your e-mail on the same computer that can't print Word documents?

If yes, one thing to try is to change the font on the Word document. For some reason, certain fonts just do not work. (Most often it is an issue with a document (or template) created on a different computer (or before upgrading the OS) and the font info gets scrambled in the transfer.) Just select all (control-A or Edit, Select All) and choose a new font. If the document has multiple fonts, do not use select all but highlight the sections separately and change the font.

If it is a different computer, check that the network is active and that all the correct drivers are installed. (One thing to check is a Universal Print Driver (UPD) software needs both the 32 and 64 bit drivers if the network has a mix of OS's. This comes up when the printer is attached to one computer and it serves as the print server.)

Print functionality depends largely on the email client. If you are using your browser you can use the view settings to make the fonts bigger and print. Or you can copy and past the text into a text editor and change fonts there.

Well before printing, you can copy & paste it on a word document. After that, increase font or change colour.
OR
You can do file \ print \ properties \effetcs tab \ % of normal size! Here you can increase the size using the slider.
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The manual doesn't list scaleable font size as a feature. You will probably have to set your font size in the document you are making.