I have added and image and text to my project. I wanted to make them fade in so i dropped the opacity to zero and made a key frame. When I tried to click on the slider to add a new keyframe and bring the opacity up, I could not click on it. It would not move. I tried to click and move any part of the time line and nothing would move. I hit the space bar to see playback, but it would not move either. I have not found anything online about this. Is this an issue any one else has had. Any help would be greatly appreciated, thank you.
Screenshots might help.
Also, more info might help too. You could close AE and re-open it and see if it helps.
When you go into your composition settings, how long is it? It looks like it's about a frame long... If that's the case, make it longer than one frame.