[MlMt] The amazing reappearing preview pane

[John Cooper]

Rob McBroom wrote (at 22:38 on 23 Sep 2016):

> On 24 Sep 2016, at 0:56, John Cooper wrote:
>
>> When I'm in a message composer window and I hide the preview pane, I 
>> type a few characters, and the preview pane simply reappears. It 
>> doesn't appear to be related to any particular key or key 
>> combination. I don't suppose anybody else has seen this?
>
> By default, when you type a message, it’s just plain text and stays 
> that way *unless* you type something that Markdown can turn into HTML. 
> Then, the message becomes multi-part and the preview pane appears so 
> you can see what the HTML part will look like.
>
> I don’t see anything obvious in your message that would trigger 
> this, but the line at the bottom is obviously an HTML `<hr>` and not 
> just a string of text, so maybe it’s something in your signature?

I don't use a signature, but you're probably on the right track.

> In any case, you might want to experiment with the options under 
> Preferences → Composer → Preview: Display.

It's set to display the preview "when generating HTML." I don't know why 
my message should have generated HTML unless *all* messages generate 
HMTL when "Markdown" is selected at the top of the message composer 
window. I'll change the preferences to never display the preview window 
and that'll probably take care of it. I do want to be able to display 
the preview manually, so I hope I can still do so when I use that 
setting.

I don't understand the styling settings even after reading the help, so 
I hope it doesn't have anything to do with those. I use the recommended 
styling method and the "Generate HTML even if only for styling" box is 
checked.
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