If you hate holding down your mouse to look around like myself, you can use the following script to toggle between mouselook mode and normal mode by right clicking once.
You will need to download autohotkey and install it yourself. Once you have that, simply save the following script to a text file with the .ahk extension. If you installed DAI in a different location, you will need to change that in the script.
----------------------------------------------------------------------------------------------------------------------- Dont copy this line 
#persistent
#IfWinActive, Dragon Age: Inquisition ahk_class Dragon Age: Inquisition
AttackKey = 1
MenuToggle = false
SetNumLockState off
IfWinNotExist, Dragon Age: Inquisition ahk_class Dragon Age: Inquisition
{
run, C:\Program Files (x86)\Origin Games\Dragon Age Inquisition\DragonAgeInquisition.exe
}
CoordMode, Mouse, Screen
SendMode, Input
NumLock UP::
Goto, ToggleMouseLook
return
RButton::
GetKeyState, state, NumLock, T
if state = U
SendInput {RButton DOWN}
return
RButton UP::
Goto, ToggleMouseLook
return
+Escape::
ExitApp
return
ToggleMouseLook:
GetKeyState, state, NumLock, T
if state = D
{
;SetCapsLockState off
SetNumLockState off
SendInput {RButton UP}
}
else
{
BlockInput, MouseMove
SendInput {RButton UP}
Sleep, 50
SetNumLockState on
MouseMove, % A_ScreenWidth/2, % (A_ScreenHeight/2)
SendInput {RButton Down}
BlockInput, MouseMoveOff
}
return