Same answer basicly!
Start with the Help files!
Roughly...
Write a text string.
Break apart.
Convert to symbol.
Set duration on the time line in frames.
Set 3 other key frames symbolized by the "0"s:
Fade in Hold Fade out
0------->0------------0-------->0
Add motion tween, between key frame 1 & 2, and 3 & 4
On the first key frame, change the alpha setting to 0% for a fade in.
On the last key frame, change the alpha setting to 0% for a fade out.
Good luck!
s-)
"If nothing else, I can always serve as a bad example!”