Yu can also add a field with a custom name to a node in a session. Let's take an actor node as example. Right click on the actor node name in the tree structure and select Add > Actor Key. The new field appears as Keys.Key.Standard Template Key in the list of the field names in the metadata table. In order to change the name of this new field right click on it and select Open in Long Field Editor. Once the editor has opened select Change key name, modify the name and select Apply. Note that: 1) the new name will always start with Keys.Key., which is there by default; 2) only key fields can have their name changed; 3) you can add a field with a custom name (i.e. key option) only in Session, Content, Actor, Media File, Written Resource and Source.§

If, after you have added and customized the new key field(s), you wish to use it for other nodes as well, you can create a favourite for this node so that you can re-use it instead of repeating the whole process for every new node.