Unexpected dimming of clips

Question

While making a five minute video of my hometown in Premiere Elements 9, suddenly half the clips in my project got about 30% dimmer. It was as if everything I shot in fuill sunlight had rather been shot at twilight. At the time I was simply moving some clips around in the timeline or the screenline. Then suddenly all the clips from the point where I was working to the end of the project went dim on me.
I expect I accidentally hit some button, menu, control, whatever. But which one?
All suggestions deeply appreciated.

Answer 1

Welcome to the forum.
Along the lines of the above response, look at the orange-yellow line (rubberband), that runs through the Clips. Compare its position in the "good" Clips, to the position in the "bad" Clips. They will very likely NOT match up. That shows that Opacity has been altered in the bad Clips. This can happen all too easily, if one accidentally clicks on that rubberband, when trying to Move a Clip. One should not work too quickly, and make sure that when they click on a Clip, they have Selected the Clip, and not the Opacity (default display) of the Clip. This nails me, when I am going too quickly.
Good luck,
Hunt
PS - one can also Select the Clip, go to Effects, then Edit Effects, and look at the Opacity setting there.