[OS X TeX] LaTeXiT and transparency

Jens Noeckel noeckel at uoregon.edu
Tue Jul 4 11:25:17 EDT 2006

On Jul 4, 2006, at 5:19 AM, Jan Hegewald wrote:

> Hello,
> Am 04.07.2006 um 07:50 schrieb Jens Noeckel:
>> Interesting: I was just going to suggest a workaround using  
>> Preview, but saw that Preview is behaving as badly as Powerpoint  
>> here. I just tried dragging a PDF from LaTeXiT to Preview and got  
>> a white background as well, whereas Adobe Illustrator correctly  
>> keeps the background empty. So it's not just Powerpoint that's  
>> doing this.
> I think Preview.app just uses white as default background color. So  
> one won´t notice the difference between transparent and white  
> background.

that's what I thought, too, since copying a PDF from Preview does  
indeed preserve a transparent background. But that's not what seems  
to happen when you try exporting from Preview as GIF. Instead, the  
white background is exported as NON-transparent white - and I don't  
see a switch to turn this wrong behavior off. If I give Preview a  
transparent PNG, though, it really shows the background as  
transparent, showing the default background color you select in the  
Preferences (dark gray, e.g.). I wonder what the point of that  
background setting is, anyway, if Preview respects it sometimes and  
not other times.


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