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Changing the Default Font Size of Thunderbird

Added by LAURA NICOLE MASSARO KAUFFMAN , last edited by LAURA NICOLE MASSARO KAUFFMAN on Dec 15, 2009 13:31


Changing the Default Font Size of Thunderbird

Thunderbird uses a default font size of 8 to display the text of folders names and message subject lines. You can increase the size of the font to create a larger display of the same messages by adding a little text file to your profile.

So if your eyes could use a break from small print, give this tip a try:

  1. Open any of these programs (NotePad, WordPad or DreamWeaver)
  2. Make a new file containing the text shown below:
  3. Go to File‚ÜíSave As... and name your file userChrome.css.
  4. Next, go to C:\Documents and Settings_[yourusername]_\Application Data\Thunderbird\Profiles
  5. There, you'll find a folder with the ending .default; click on this folder.
  6. In the .default folder, create a new folder called chrome.
  7. Double click to open the chrome folder.
  8. Copy or move your newly created userChrome.css file into the chrome folder.
  9. Finally, open Thunderbird. Your messages will display in the revised font size.
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Hint: If the font size is too large or too small, you can use NotePad or WordPad to easily change the font size. Note that the file shown here contains font-size: 10pt, but you can simply increase or decrease the number as needed.

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Tip: If you are proficient with CSS, have DreamWeaver, and would like to make other changes, you can make other edits like changes to font family, changes to font color, or more advanced tweaks like these: http://lifehacker.com/301520/best-firefox-userchromecss-tweaks and http://lifehacker.com/197715/customize-firefox-with-userchromecss

Thanks to Sandy Ball and Nikki Massaro Kauffman for this handy tip!