[pecinko]

It's not a setting or number that you can simply change... it's an image.
You can do that yourself in case pecinko prefers to keep it as is:
1) create a plain black background png to the transparency of your choice
2) edit the view_videos.xml file, and search for the word "Vignette" ....there are several entries so experiment until you find the one you want (I don't know the one for fanart 2 at the top of my head). You will see something like <texture>img/Vignette_somenumber.png</texture> ...change this to the image you created...eg <texture>c:\myimages\vignette.png</texture>

Edit: oops too late...just saw pecinko's reply

Cool reply!

I'll make it easier. Look for

<control type="image">
<include>Dimensions_Fullscreen</include>
<texture>img/Vignette_58.png</texture>
<aspectratio>stretch</aspectratio>
</control>

in View_Videos.xml and make it

<control type="image">
<include>Dimensions_Fullscreen</include>
<texture>img/Vignette_58.png</texture>
<animation effect="fade" end="85" time="0" condition="true">conditional</animation>
<aspectratio>stretch</aspectratio>
</control>

Added line will lower transparency to 85% on an existing image. You will see at ones why I said it's not that easy. I have to remake Vignette_58.png to make it look proper.

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by Timeline Skipping, you just can move the squared Cursor at any Point you want in the Timebar (Bufferbar). That make it possible to jump to any Time during Playback. That would be great, because i use the 7-Key Aluremote for XBMC Navigation (MacMini with Bootcamp and W7).

Huh.. I'm not sure....

I'm using Up/Down as quick jump to settings. This would mean I would have to give up Down. Furthermore, I don't find it intuitive to end up in progress bar. What about small skip / big skip on your remote?