White triangles on top corners

It's very clear once you understand it, you know? Ha. A young friend was studying C++ years ago in a college class. The instructor LOVED the textbook he'd selected. Which explained everything in the book in terms of something else, elsewhere in the book. Which then explained that by something else, elsewhere in the book ...

Totally circular reasoning. And if you didn't understand something, there was no way whatever to get it solved by reading the book. The instructor thought the book was the clearest, most informative book every written on coding. I read through a couple chapters, and thought students that paid $85USD for that book should be allowed to um ... think up something nasty. Ahem.

Yea, the reason you're getting the little triangle on a frame-hold is it is telling you there are no frames for the transition to apply to. Because, when you get past the cut, there needs to be some more unused frames of the first clip past the cut. That's how transitions work ... they use the media past the cut on the lead-in clip, and before the in-point on the second clip.

If you have two uncut clips next together, there are no extra frames for the transition. The first clip has no 'handle' on the end, after the cut, for use as the transition fades out. The second clip has no 'handles', no frames prior to the cut, for the transition to blend in through.

When you set a frame-hold, you've done exactly the same thing. There is only the one frame, there are no frames that would be considered "handles" for use in the transition.

I understand your frustration as when I started out, I had naturally the exact same problem with transitions. It's after you understand how transitions work, that it seems blindingly obvious. And was totally opaque before.

For 25 years or so, we had a full color lab in our portrait studio doing high-end pro printing, both 'package' and custom, all to a very tight standard for contrast, density, and skin tones. Much color printing knowledge was actually very different than what you would have expected, and most new employees thought my instructions oft made no sense. Well, how it actually worked hadn't made sense to me when I started doing it either, no shock there.

I learned that when starting out new employees, I needed to tell them NOT to think, simply do as instructed for at least two weeks. No questions would be answered, as any answer I could give would be simply incomprensible. Completely out of "sensible" nature. When they finally hit the point where they came to me and said ... none of this makes any sense whatever ... after completely giving up trying to puzzle it on their own ... I could teach them how to think this stuff through.

I found the transition to NLE work sadly to be very much like learning color printing in a wet lab. Much of this makes no sense at first. Most of what you know or think should work is simply bogus, often nearly opposite of what really happens.

I do totally get the frustrations of anyone dealing with all this. But understand, after you get enough of a handle on all this to move along farther ... the learning curve gets steeper.

Oh ... joy.

Neil