I did this video for user who asked how can you fade in and out of text credits in trakAxPC Pro.
I show how you add fade indicators to introduce fades or you can insert a volume brightness envelope.
I hope this helps and if you have any questions, please do not hesitate to ask.
You can access plenty more tutorials at the following link
http://www.trakax.com/software/support/create_a_quick_mix/
Best regards
Cormac