[default] 0.5 [description] The opacity value of the overlay. Allowed are values from 0 to 1. [property] 
overlayOpacity
s p e e d
o v e r l a y O p a c i t y
t i t l e
s c a l e
b o r d e r
t e x t I m a g e
t e x t O f
c a l l b a c k