I am trying something for the first time.
I want to footage to appear behind the text and only show through the text.
I found a tutorial on adobe TV http://tv.adobe.com/watch/digital-video-cs5/making-text-masks-in-after-effects/ for alpha matte technique that suits but here's my problem.
The surounding area around the text is white whereas it should be black like in the tutorial.
Here's a screenshot.
Can anyone help?
Looks like your Composition Bacground color is set to white. Check the Composition Settings.