NameLayer

NameLayer is a plugin (source) which manages the creation of NameLayer Groups, often called nl groups or simply groups. Namelayer groups allow sharing reinforcements and sending shared chat messsages. Users in a Namelayer group can be assigned four different roles: member, mod, admin, or owner, each coming with an increase in permissions.

Roles
Each Namelayer group has four different roles that users can be assigned to: member, mod, admin, or owner. There is also the primary owner role, which can only be held by one member at a time.

Roles give certain permissions to members assigned to that role. Permissions assigned to each role can be customized by anybody with the  permission (by default, only owners and primary owners).

GUI
Namelayer can be used entirely via commands, but it also offers a GUI which can be easier to use. Use the  command to bring up the Namelayer GUI.



The first screen of the Namelayer GUI shows rows of chestplates. Each chestplate corresponds to a Namelayer group, and the type of chestplate shows your permission level. Leather is member, gold is mod, iron is admin, and diamond is owner or primary owner. The enchanted chestplate shows your default group, which is the group used by Citadel commands when a group is not specified.

Even though an account can be Owner of any number of NameLayer groups, an account can only be Primary Owner of up to 15 groups; after that, group creations and Primary Owner transfers to that account are denied, until groups are either transferred to another account or deleted.

One can get around this limit by owning multiple accounts and adding the actively used accounts as Owner (instead of Primary Owner, which is one of the alt accounts).

Unique Usernames
Although minecraft allows updating your account name, namelayer mechanics rely on a player's username being unique. Namelayer will use whatever username you first log in with. Changing your minecraft account username will not change it on your namelayer groups.

If a player logs in with a username which is already in use in a namelayer group on the server, that player's displayed name will have a "1" appended to it.