SRT files can't contain advanced formatting.
You must use an encoding-tool or video player that supports the ASS format, to get the full formatting Aegisub supports.
Do not PM me asking for help with Aegisub, Automation, karaoke or anything like that, I won't reply.
Ask your questions in the public forums. Use the Search function, somebody probably asked the same question before.
All rights reserved to call you insults if you ask poorly thought out or redundant questions.
Experimenting is free and is a great way to learn things.