How can I change the size of received emails?

How can I change the text size in my emails without having to change it everytime?

• the text in the heading and subject line are larger, but I don't know how to do that in my exmails and make it stay that way without having to change it everytime I write an email.

• Answer:

  To change/increase the font size, click options in the upper right of your yahoo mail page -> click "general preferences" -> next to "font size" select your preferred font size: "Smaller" will make the font of messages one size smaller than your browser's default setting; "larger" will make the font one size larger. Once you have chosen a new font size, click the "Save" button to activate your new settings -> Yahoo! will confirm the changes by displaying "Your changes have been recorded." Please note that the above steps will affect only the text of your email messages, and only those messages displayed in plain text (the fonts of HTML messages will not be affected). To change the font size of all of the text in the Yahoo! interface, you must change the default font size of your browser.