Hi, i would like to know how see tab on guitar pro 6 for no guitar instruments.

In guitar pro 5 i could see the tab for pianos or vocals and played them on guitar, but in guitar pro 6 i can only see the pentagram.

Thank you!
Thank you for the answer!

This is not exactly my problem. 
I can see tab for the instrument "guitar", but i can't see tab for other instruments (like pianos for example).
Following the video's instruction i can change only the guitar setting (slash, standard, tablature), but for the other instruments i can't...