You have the ability to change the way Text is displayed. For instance, to change the font size of a Label to a smaller size you can do it,
like this.
The default size is 14.
Here are some resources to help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook http://www.appinventor.org/book2 ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
What exactly is the purpose of your question? So much time is invested here to answer questions whose intent / goal - and not least benefit - is unclear.
So describe exactly what your goals are and what your purpose is in answering the question.
I don't know it and don't see what that might be useful for.
No, it was completely unclear.
But now you bring up a question about the Notifier. So the question should / could have been:
Can the text size of a Notifier be changed?
You have now received an answer to a specific question. To be rude and insulting now is quite naughty.
For the last time: The question was unclear and in particular its purpose.
For next time, first read this: (specially → point 2):