''CTRL blank'' = reset all font attributes to what you defined in 'Tools>Options>Display>Formatting' Is it possible, that you press by chance ''CTRL blank'' just before the font changes? If you want to file a bug to mozilla (the organization which develops TB) you should have a look at )'' ''(By the way, this forum is a place where users help others, not developers or any support organization. Then press CTRL U to see the html created. To do this, simply save your mail (File>send later in the Compose Window) after a font switch occurs and open it again (from outbox folder).

T may also be helpful to check what html code TB creates. So when you're typing your mail and press unintentionally CTRL blank, the font will change back to the default. Thunderbird uses many shortcuts when creating a mail (depending on the version), e.g.ĬTRL blank = reset all font attributes to what you defined in 'Tools>Options>Display>Formatting' Is it possible, that you press by chance CTRL blank just before the font changes? I have another idea, what could be the mess: If you want to file a bug to mozilla (the organization which develops TB) you should have a look at ) (By the way, this forum is a place where users help others, not developers or any support organization. I think, Thunderbird can not find a solution, because it's not a software problem. It doesn't have any effect on the fonts embedded into the message he's writing. Again, an html source viewer may be necessary to see if that's what's happening in this case.īut that will set the font ''displayed'' to the sender as he composes his message. In the past, users have reported font size change tags appearing randomly in the text of the message being composed. You are right to raise the question about signatures because they also introduce invisible formatting.

HTML can be complex it's hard to know exactly where your insertion point is. Or use an HTML source viewer/editor to see where your cursor is, or what is being inserted for you. I still think that Stationery is useful because it explicitly defines styles, and some buffer blank lines are the best way to avoid travelling past invisible font tags. I suspect our OP has discovered that his messages can look fine when being written but are all over the place in the recipient's mail program, because this setting can make TB hide font changes so he doesn't see them when composing.

$change size of email type$

But that will set the font displayed to the sender as he composes his message.

Change size of email type