Changing right column width

Default standard width for the sidebar / right column is 165px

Sidebar width.
width = sidebar width
margin-right = -(sidebar width + sidebar left margin)
If you're changing this values, don't forget to change:
'margin-right' in '#main_container' in file '/main/home.css'

Example changing infobar width to 330px

/interface_{custom}/main/home.css

 
#main_container {
margin-right: 340px;
}
 
#sidebar {
margin-right: -340px;
width: 330px;
}