The Time Codes procedure contains a table, in which you can enter an optional number of rows for your own time codes. Each row gets an ID that identifies the time code in question. After that you enter a time code name. The first two rows are pre-defined time codes that come with the system. The first one Undefined is the system default, and is used when time codes are not applied. These two time codes cannot be changed.
The Time Codes table.
When using the Preparation procedure, you can select these time codes in the TC column in the operation rows. That column is only visible if the system setting Use time codes for operations? has been selected in the Global Settings module.