Main Table
This option allows us to define which fields and in what order we want them to be displayed in the Main Table, this table would be the general list for each type of Tickets.
Link: It allows you to set the field as a link to redirect to the ticket form from this column
Main: It allows us to define the field as Main, only one main field is allowed by type of ticket, and with this we can establish which field is going to appear to select the ticket within other options.
Size: It allows you to define the size of each column depending on the field.
Visible by default: It allows you to define the Visible field initially.