edit eemcTwMask.dat
* one row per tower
* must give all 3 'coordinates' : crate, channel, name
* '#' in the first column deactivates given row
Example if content:
# Pplot list of masked EEMC towers
# format: crate channel towerName
1 97 12TC05
4 18 06TA03
4 117 07TC05