There is a bit of documentation here about hand editing the EMS gauges:
CUSTOMIZING THE EMS GAUGES
A quick way to change the EGT/CHT gauge is to export your settings and look for a file with a .dfg extension. You can open it with a text editor. Windows WordPad works. Search for a section called "Layout_20={". That is the 20% Engine layout. Scroll down until you fine the following code:
Code:
EGT_CHT_WIDGET={
type=WIDGET_EGT_CHT
x_offset=0.5
y_offset=0.5
width=35
height=27
params=3
params=2
params=0
}
Change the "width" to something smaller than what is there. Default width is 43. The first "params=" is the thickness of the bars and the second "params=" is the distance between the bars. I changed mine to make the height of the gauge less than the default also.
Make the changes and save the file. Take it back to Skyview on the thumb drive and use Load files to load it back into Skyview with the changes.
You can use the regular Skyview editing functions to move the gauge around, but if you change the style or size it will loose the settings you changed by hand.
HTH