Something I believe is possible in Camtasia but I'm not sure, I would like to have the option to alter the background transparency in text clips and subtitles, instead of just changing the color. Without the background, the text can be hard to read when it's in an area with the same color because the shadows and outlines aren't big enough; and with the background, you end up blocking part of the video and the text looks like it was just hurled on there.