Sometimes eMail messages arrive in font sizes that are difficult to read. Can eMail font sizes be changed? It depends.
The font size in eMails received and read in a browser, such as Internet Explorer, can be easily changed. This type of eMail is called “WebMail.” eMail font size in WebMail can be changed similar to changing the font size on web pages – select “Page,” then “Text Size” and select a larger or smaller text size. Alternatively, hold down the "Ctrl" key and press the “+” or “-“ key or hold down the "Ctrl" key and roll the mouse scroll wheel (“Mouse Wheelies”) to change the window zoom and the font size.
The font size in eMails received and read in programs such as Outlook or Outlook Express (or Windows Mail in Vista or Windows Live Mail, Microsoft’s update for Outlook Express) can be changed with some changes in the programs. There does not seem to be any way to change font sizes in Outlook. In Outlook Express, and similar programs (Windows Mail, Windows Live Mail), there does not seem to be any way to change font sizes in eMail read as “HTML” mail (eMail with fancy graphics). In Outlook Express, the font size in eMail read as “Plain Text” can be changed by holding down the "Ctrl" key and rolling the mouse scroll wheel. To change the read view of eMail in Outlook Express, on the Menu Bar select “Tools,” then “Options” and check “Read all messages in plain text.”
The font size in eMails received in Thunderbird, an eMail program alternative to Outlook Express, can be changed by holding down the "Ctrl" key and pressing the “+” or “-“ key for both “HTML” mail and plain text mail.
Almost all eMail programs (Outlook, Outlook Express, etc.) have various ways to change the font size and type face for sending eMail.