I believe you'll need to edit your udm-custom.js file as follows:
find these lines:
Code:
um.navbar = [
"-6", // nav -> menu x-offset (+-)["n" pixels]
"-11", // nav -> menu y-offset (+-)["n" pixels]
"7.5em", // width ["em"|"ex"|"px"] (vertical navbar only - horizontal navbar items have "auto" width) ("%" doesn't work right)
];
and change the 7.5em to the width you desire. (i.e. 180px)
Example:
Code:
um.navbar = [
"0", // nav -> menu x-offset (+-)["n" pixels]
"0", // nav -> menu y-offset (+-)["n" pixels]
"180px", // width ["em"|"ex"|"px"] (vertical navbar only - horizontal navbar items have "auto" width) ("%" doesn't work right)
];