question about chord names

[chip]

I am adding chord names to my first piece and have a couple questions -
1. When I enter something like F1:maj7 the resulting image shows 
Ftriangle (meaning, I believe, F dim). How do I get FMajor7?
2. How do I show the bass note of a chord? For example: FMaj7/A
3. How about a chord with an alternate flat 5?
For example: Emin7(flat 5)

I do understand that Lilypond was/is developed as a classical music 
program, but it might work just as well with other forms, like jazz, 
which is what I will be working with, mostly.

Thanks,
Chip