# Modify a Bitmapped GCOS Group

This procedure describes how to modify a bitmapped GCOS by adding or deleting groups.

1. From the Main Menu, select (S) System Maintenance, (R) Reconfiguration, and then (G) Group COS.

2. Select (C) Current GCOS and then enter the n umber of the bitmapped GCOS (1-64) you want to modify, or press Enter if the displayed GCOS is correct.

3. At the Enter GCOS name prompt, enter a descriptive name for the GCOS (up to 15 characters), or press Enter if the displayed name is correct.

4. Select (A) Add Group or (D) Delete Group, as required, and then enter the Group number(s) to add or delete (1-128) in one of the following formats:

   - A single group, for example 7

   - A continuous range of groups, for example 2-7

   - A series of groups, for example 1,2,6,7

   - You can mix types of entries, so you can specify all the groups necessary in one attempt. For example, this entry is valid: 1-4,8,9,12. Do not enter spaces after commas, and do not end the entry with a comma.