Well, it's been a month since I posted the above request for more information and since the OP did not respond, I did some experimentation. It's not quite as simple as the above discussion would lead one to believe, since the watched icons don't appear in the proper places (and most of the time don't appear at all) if you only make the two changes mentioned above. This is what I had to change in View_55_BigPanel.xml to get three rows with six thumbs per row (total 18 thumbs on the screen at any one time) in the Big Panel view (the changed items are
bolded, also the indentation of the lines was removed when I posted this here, sorry about that):
<?xml version="1.0" encoding="UTF-8"?>
<includes>
<include name="BigPanelPosterDimensions">
<posx>18</posx>
<posy>40</posy>
<width>
164</width>
<height>
246</height>
</include>
(.....skipping down.....)
<itemlayout condition="container.content(MusicVideos) | [Container.Content(tvshows) + !Skin.HasSetting(55_UseBanners)] | Container.Content(Movies) | container.content(seasons)" height="
300" width="
188">
<control type="image">
<include>BigPanelPosterDimensions</include>
<include>PosterThumbBG</include>
</control>
<control type="image">
<include>BigPanelPosterDimensions</include>
<include>PosterThumb</include>
</control>
<control type="image">
<posx>
153</posx>
<posy>
249</posy>
<width>
22</width>
<height>
22</height>
<texture>$VAR[Overlay]</texture>
</control>
</itemlayout>
<focusedlayout condition="container.content(MusicVideos) | [Container.Content(tvshows) + !Skin.HasSetting(55_UseBanners)] | Container.Content(Movies) | container.content(seasons)" height="
300" width="
188">
<control type="image">
<include>BigPanelPosterDimensions</include>
<include>PosterThumbFO</include>
</control>
<control type="image">
<include>BigPanelPosterDimensions</include>
<include>PosterThumb</include>
</control>
<control type="image">
<posx>
153</posx>
<posy>
249</posy>
<width>
22</width>
<height>
22</height>
<texture>$VAR[Overlay]</texture>
</control>
</focusedlayout>
(.....)
I still won't guarantee that this is EVERYTHING that should be changed but as far as I can tell it gives the desired layout with no unfortunate side effects. YMMV. Each of the bolded values shown is exactly ⅔ of the original value (in other words, the original value multiplied by 0.666667), rounded to the nearest integer value. Before you begin making changes, it would be a very good idea to save a copy of the original file someplace safe, in case you manage to mess things up!
Note: I do not know what the first <posx> and <posy> values in the file control, that is why I did not change them. I did test changing them to ⅔ the original values and did not see any discernible difference, so since I did not know what they are for I thought it best to leave them alone.
Pick the one you want to change? Preferably the one with poster thumbs 