Media Editor:

Select the variable to be edited at the bottom, set the desired language in the list box at the top and then click Edit.

-> The content of the variable is now displayed.

PARTproject:

In the PARTtemplateDesigner, click on the Open in PARTproject button in the settings dialog for templates.

Details can be found at Section 5.9.17, “Tabbed page: Media Variable ”.