SIMA video studio 300 titler help

Hello there everyone I hope you all here are doing well, I wanted to post on here to get some help with my SIMA video studio 300 titler. It seems to be working but I can’t figure out how to get my title over my video. I tried the ext. sync button but it only shows my input video. I found this manual online for the 500 mode but couldn’t find for the 300, any help is appreciated I really appreciate you for your time.