Hello @annettes,
Thank you for reaching out to us!
Have you installed the PRO theme?
Once you install it, in order to create a Portfolio slideshow go to your dashboard > Portfolio > edit the one you want > scroll down to Portfolio options > Media Layout > and select from the drop-down ‘slideshow of attached images’.
Please see my screenshot:
https://gyazo.com/35a3635709e88d6c616e9afdfa2c7fcf
Then on your right hand side of the screen you will see an ‘Add images’ button > click there to add your images > save.
Screenshot here: https://gyazo.com/ddb3c16fa23c4d204e8a0ea59ade41c0
This should do it. Please give it a try and let me know how it goes.
Also, please keep in mind that we offer support through email for all our premium clients. You can reach out to us on this email: help@cpothemes.com
Best wishes,
Mihaela