Thank you for the reply. It took me a little while to "get it"; however I now understand that the application is asking me to have content from each clip to the left and right of the transition be fully within the transition so that the two clips fully overlap for the entire duration of the transition. (Still not sure I have even accurately stated that to where it makes sense - very tricky to put into words!)
I don't mean to hijack the thread topic but I would like to say that I am super excited about where this App is headed in that it in one of the few Apps that is actually trying to bring desktop quality software to iOS. (I gave up on my PC about 1.5 years ago and I only use my PC when I absolutley have to...)
That being said I have experienced several times with the App (especially playing around with the transitions) where I was no longer able to play/preview the video or even move the timeline around to get the offending transition to delete it to free it from this "locked" state. I often had to force close the App and re-load it to be able to continue. I wish I had more information for you and if I can figure out the steps to re-produce, I will share it in a new thread.
And to answer your questions about my setup/project:
iOS Version: 10.3.2 (14F89)
Device: iPAD Pro 12.9" (1st generation)
3 total clips (4k from a DJI Mavic drone): 2 about 4GB (9:20 minutes) each the other about 420MB (1:20)
Here is a snap shot of the "problem area":
IMG_0199.JPG [ 859.83 KiB | Viewed 634 times ]
Thanks again - love the App - keep it up! Death to the PC!