I saw a clip yesterday, it has a scene that the image layer changed into solid red and then changed back like the picture below. I don't know how they did it and really want to learn, please show me how to do it.
sorry for weird English...
The image is it's own layer with an alpha channel. YOu can change the image color by adding a number of different color effects, like fill, hue/saturation, tint.
Understanding layers and alpha channels is key in using AE. I'm assuming you are pretty new to AE, so I suggest you check out the links that are mentioned in this thread. Provides links to a lot of basic training for AE. https://forums.creativecow.net/thread/202/900520
Johnny Cuevas, Editor
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.