Change email contents display font size of Thunderbird

Thunderbird email contents display appears to act similarly to a web brower, so hitting Ctrl and the '-'/'+' signs shrinks/enlarges the font size.

Note: this is not explained anywhere, and the preferences all change a different setting, AFAIK

Exclude domains in your google search results

1.  Put '-' in front of 'site:' operator
1. e.g.
1. Try: how to learn tibco -site:tibco.com -site:tibcommunity.com
2. searches for materials on "how to learn tibco" while ignoring all Tibco's noise

FYI: It seems there is a copyright, so searching for "SOA" instead might lead to more books with desired material covered.