if you export to a video file then it will not wait for you to press a key it will just play the file.
Photostage has a function called image sequence, if you export to a image sequence, this will create a folder and put all your images inside it and rename them so they play in the order shown on your project.
you would then be able to use any photo display tool and move to the next image when ready.
#photostage #manual #interactive