The control buttons allow you to modify the contents of the list of custom tasks:

•  Add custom task (key INS)
  A new row with a blank custom task is added. You have to fill in the ID of the custom task which allows you to uniquely identify it in your custom action or custom screen, as well as the description which is displayed as a checkbox to the user. If you have to internationalize the description of the custom task for different media files, please use a user variable. In addition, you can choose whether the custom task should be initially selected or not and whether a spacer element should be added before this custom task.
•  Remove custom task (key DEL)
  Removes the currently selected custom task after a confirmation dialog. Also available from the context menu.
•  Move custom task up (key ALT-UP)
  Moves the selected custom task up one position in the list. Also available from the context menu.
•  Move custom task down (key ALT-DOWN)
  Moves the selected custom task down one position in the list. Also available from the context menu.

In order to edit any column with text, please double-click on it.

If you leave the dialog with the [Ok] button, your modifications are stored, if you hit [Cancel] or close the window, they are discarded.