On 05/06/12 14:48, Norman Silverstone wrote:
I have asked this question on another users group but so far, I have not
had an answer which works. Using Thunderbird 12.0.1 and Xubuntu 12.04
32-bit plain text the font in the message window is very small and I
want to make it larger. I have tried making changes using Edit ->
Preferences -> Display -> Formatting -> Advanced but nothing changes. I
assume I am missing something but I don't know what. I have tried Google
but I am more confused than ever. Could someone, please, be kind enough
to point me to where I might find the answer to the problem. Thanks

In the dialog you refer to, the first setting is "Fonts for:". Each message has a label on it, which you don't normally see, which specifies the way in which the contents are to be interpreted. The likelihood is that almost all of the messages you receive will be encoded by the sender using "Western", or possibly "Central European". You can have different sized fonts for different encodings, so the chances are that when you see a message which you can't change the font size, it means that message is encoded with a setting other than the one you are trying to change the size of. You didn't mention whether that is something which you have already tried, but have a look at the headers using "View>Headers>All" and look for the "Content type" setting. That should tell you how the sender has encoded the message, and give a clue as to what you need to do to make sure that you know what encoding of font to change in the advanced settings.

Try settings "Fonts for" to "Western" and see if that makes any difference.

I see from your settings that you have outging mail set to "US ASCII". I have mine set to "Unicode (UTF-8)", which is the standard encoding in Ubuntu, and backwards compatible with "US ASCII". If you send email to Windows users which contains foreign language characters, they may not see them correctly if their email client doesn't read the headers and display UTF-8 correctly, but if you don't write emails in a foreign language, that won't affect you or them using UTF-8. You can also set incoming mail to Unicode (UTF-8), and if you do see character errors in an incoming email, you can correct that by selecting "View>character encoding>western" (or whatever it says in their headers they have encoded it with).

Try unchecking "Allow messages to use other fonts".

Check "use fixed width fonts for plain text messages", and after you have done that, the setting which affects font size in messages should be the one labelled "Monospace".

Worst case is you should be able to change the font size (if it needs to be bigger) with the "Minimum font size" setting.

That's about all I can think of for now. I am a little surprised that Ubuntu didn't set up UTF-8 in Thunderbird (which was the case last time I did a fresh install, which was a while ago as the profile I'm using now originated in Thunderbird 2).

--
Intellect is about thought.
Property is crime.
Intellectual property ~ Thought crime.
JimP


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