Why I cannot change the screen color and other characteristic for the bar in Email us as I do with other screens such as Custom text. I go to the show/hide buttom in email us but there is nothing about change the characteristic I want to chage the bar color in email us from blue to light green to make it same as other my app screens.

The Email Us screen, the Email Compose Sheet is controlled by iOS, not you or your code. On some devices the compose sheeet that opens will inherit the same color scheme as the previous screen. Try this: a) Look at the Advanced Properties of the menu that holds the button or row to tap that loads your email us screen b) Set this menu's navigation bar color to something other than the default. Like black: #000000 for a test c) Refresh you app. Tap the email us, does the email compose sheet have a black nav bar. I bet it does ;-)