How to define Application Working Area on the screen?

[Siu]

A formula for alignment? You can use something like what roaminggamer posted and can read more about this topic here:

contentWidth or actualContentWidth?

1-Why doesn’t the content area automatically fill the screen? is it because of the “letterbox” scaling option? 2- Why do I have to compensate for the width and not the height? it gets positioned correctly on the y axis with no extra calculations object.x = display.actualContentWidth + display.screenOriginX object.y = display.actualContentHeight – no extra calculations [14kwbaw.png] 3- object.x = 0 [243lppz.jpg] It’s just weird that “x = 0” is not the leftmost position on the screen, I hav…

local w 		= display.contentWidth
local h 		= display.contentHeight
local fullw		= display.actualContentWidth 
local fullh 		= display.actualContentHeight 
local centerX 		= display.contentCenterX
local centerY 		= display.contentCenterY
local unusedWidth	= fullw - w
local unusedHeight	= fullh - h
local left		= centerX - fullw/2
local top 		= centerY - fullh/2
local right 		= centerX + fullw/2
local bottom 		= centerY + fullh/2