Hello, you can check My Yessh UI and in the yessh + addon you'll find what you need in the xml file :
This is where you have to change the width of the level meter.
<Element ID="LevelMeter" X="0" Y="761" Width="1024" Height="6">
<Element ID="LevelMeter_BonusMeter" X="0" Y="0" Width="1024" Height="6">
Good luck messing with the XML file, I spent hours to figure out to use it.
<Mapping ArtAssetID="LetterBoxBottom" FileName="..\Graphics\letterbox_bottom_XP.tga"></Mapping>
<PanelFile ID="toolbar">
<!-- Set your resolution below Width and Height -->
<Element ID="ToolbarField" X="0" Y="0" Width="1024" Height="768" Detach="1">
<!-- Y=Height-85 Also Set your resolution Width and Height -->
<Element ID="ToolbarFieldMain" X="0" Y="683" Width="1024" Height="768"></Element>
<!-- Y=Height-7 Also Set your resolution Width, do not change the Height -->
<Element ID="LevelMeter" X="0" Y="761" Width="1024" Height="6">
<!-- Set your resolution Width only in the 2 lines below -->
<Element ID="LevelMeterFill" X="0" Y="0" Width="1024" Height="6">
<Element ID="LevelMeter_BonusMeter" X="0" Y="0" Width="1024" Height="6">
</Element>
</Element>
<Element ID="ToolbarButton_LevelUpXP_TutorialHighlight" X="1" Y="1" Width="1" Height="1"></Element>
<Element ID="ToolbarButton_Experience_TutorialHighlight" X="0" Y="1" Width="1" Height="1"></Element>
<Element ID="LevelMeterText" X="0" Y="0" Width="1" Height="1"></Element>
</Element>