how to fix position of subtitles

[hannibal1891]

Greetings! I'm new in all related to dvd/blu-ray authoring, and i have been strugling with something related to subtitles.
I have a video whose resolution is 720 x 480, and i have a ssa subtitle file. I use convertxtodvd 4. in the resulting dvd the subtitles appear very low in the image, you can only see upper half of the text. i tried to fix the resolution of the ssa file with aegisub, but the result is always the same. so i changed the position of the first line, also with aegisub, to {\pos(360,440)}, but i could not find the way to change all the 1500 lines automatically to the same position. could anyone help me with this?
THANKS IN ADVANCE!

[guns1inger]

It might be easier to use DVDSubEdit on the files ConvertXtoDVD produced, or look at the subtitle position features in ConvertXtoDVD itself.

[AlanHK]

i changed the position of the first line, also with aegisub, to {\pos(360,440)}, but i could not find the way to change all the 1500 lines automatically to the same position. could anyone help me with this?
THANKS IN ADVANCE!

SSA files are plain text.
Open with a text editor and do a search-and-replace (or maybe Aegisub supports this).

Or you can use DVDsubedit to adjust positions in a VOB set. Change one then
"Edit/Apply last modification to all", and save

[hannibal1891]

Thanks guns1inger and AlanHK! Problem solved! Now I have another problem, ConvertXtoDVD sometimes does not recognize italic tags in some lines of the .ass file, and in the end of it appears, for ejample: ¡Jenny! ¡Please go!{\i0}. I played my video file with the subtitles in VLC media player, and everything is perfect, but when it comes to the DVD, only some of the lines have this problem. Is there another software like ConvertXtoDVD for authoring dvd's with capacity to read .ass files with all the tags? Or a different software like Aegisub for editing .ass files, and adding tags like bold, italic, etc.?