Assuming that you are running 1.11+ then use the custom queue feature.

custom queues:
Admin panel -> Settings -> Tickets -> Queues.

If you are running 1.11 please upgrade to 1.12 immediately.

    Okay... so add the field to the Ticket Details form.
    Use custom queues to display it.

      ntozier i have the variable: %{ticket.pcnro}
      but now I have to find the file where I can add that variable

        Admin panel -> Settings -> Tickets -> Queues.

          So then it sounds like you are all set. Should I close this thread?

            ntozier nop,

            I have not been able to finish, because I think they do not understand what I'm needing ..

            I need here, to be able to add a column, which is called "PC Number" https://prnt.sc/nio2l0

            and that this column shows the number of pc that believes in the variable is https://prnt.sc/nio3y2

              You said that you already created the variable and added it to the queue... So there is nothing left to do. Adding it to the queue adds it as a column.

                ntozier when I speak of column I speak of these: https: //prnt.sc/nio2l0

                  for me that's not a column, that's a menu item ..

                  Then you did not add the item [variable] to the queue you want it to display on.

                  Admin panel -> Tickets -> Queues
                  Click on the Queue you want to edit.
                  Click on Columns.
                  Add your variable as a column.

                    You cannot add a form.
                    You can add a variable/column.

                    Then you click Add New and in the Primary Data Source you select the variable you want to add.

                      Add new first.

                      Then select the data source.

                        ntozier It must be an error because it does not appear "-Add New-"

                          Then you are not running the current Stable (1.12).