Not really a question but i made a script wich allows you to fullscreen the second ableton window aswell,

run the script
select the second window
hit shift+Printscreen

- if that does not work ,
- wich is possible because of how windows does not require your main display be nr1 anyway
- hit shift+prtscr again (restores it)

and now hit shift+scrollock
that should do it

also works for the primary ableton window (similar to F11 only this script does not hide the menubar o top)

if you have autohotkey installed you can save the ahk script and add the line "inlcude ableton....fix.ahk" in your running script, also there is some commented out code wich if uncommented also hides the taskbar if you have one on both screens.

if you dont haveahk installed you can download the exe wich does not allow editing but works the same and comes with a nice taskbar icon instead of the green"H" for autohotkey users


both files can be found in this folder:
https://mega.nz/#F!kLp3zSJZ!58jb5eN-a5tAyi7FZBZivA

full ahk code below:
Code:
#UseHook On


GetMonitorIndexFromWindow(windowHandle)
{
	; Starts with 1.
	monitorIndex := 1

	VarSetCapacity(monitorInfo, 40)
	NumPut(40, monitorInfo)
	
	if (monitorHandle := DllCall("MonitorFromWindow", "uint", windowHandle, "uint", 0x2)) 
		&& DllCall("GetMonitorInfo", "uint", monitorHandle, "uint", &monitorInfo) 
	{
		monitorLeft   := NumGet(monitorInfo,  4, "Int")
		monitorTop    := NumGet(monitorInfo,  8, "Int")
		monitorRight  := NumGet(monitorInfo, 12, "Int")
		monitorBottom := NumGet(monitorInfo, 16, "Int")
		workLeft      := NumGet(monitorInfo, 20, "Int")
		workTop       := NumGet(monitorInfo, 24, "Int")
		workRight     := NumGet(monitorInfo, 28, "Int")
		workBottom    := NumGet(monitorInfo, 32, "Int")
		isPrimary     := NumGet(monitorInfo, 36, "Int") & 1

		SysGet, monitorCount, MonitorCount

		Loop, %monitorCount%
		{
			SysGet, tempMon, Monitor, %A_Index%

			; Compare location to determine the monitor index.
			if ((monitorLeft = tempMonLeft) and (monitorTop = tempMonTop)
				and (monitorRight = tempMonRight) and (monitorBottom = tempMonBottom))
			{
				monitorIndex := A_Index
				break
			}
		}
	}
	
	return monitorIndex
}





+PrintScreen::
SysGet, Mon1, Monitor, 1
priW:= (Mon1Right - Mon1Left)
priH:= (Mon1Bottom - Mon1Top)
SysGet, Mon2, Monitor, 2
secW:= (Mon2Right - Mon2Left)
secH:= (Mon2Bottom - Mon2Top)

	WinGet, TempWindowID, ID, A
	scridx := GetMonitorIndexFromWindow(TempWindowID)
		;MsgBox, 0,, %scridx%
	If (WindowID != TempWindowID)
		{
			WindowID:=TempWindowID
			WindowState:=0
		}
	If (WindowState != 1)
		{
			WinGetPos, WinPosX, WinPosY, WindowWidth, WindowHeight, ahk_id %WindowID%
			WinSet, Style, -0xC40000, ahk_id %WindowID%
			If (scridx = 1)
				{  
					WinMove, ahk_id %WindowID%, , 0, 0, priW, priH
				}
			If (scridx = 2)
				{  
					WinMove, ahk_id %WindowID%, , priW, 0, secW, secH
				}
			;Hide Windows Task Bar and Start Button. (Remove the following two lines if you don't want that behaviour)
			;WinHide ahk_class Shell_TrayWnd
			;WinHide Start ahk_class Button
		}
	Else
		{
			WinSet, Style, +0xC40000, ahk_id %WindowID%
			WinMove, ahk_id %WindowID%, , WinPosX, WinPosY, WindowWidth, WindowHeight
			;Show the task bar again
			;WinShow ahk_class Shell_TrayWnd
			;WinShow Start ahk_class Button
		}
	WindowState:=!WindowState
return

+ScrollLock::
SysGet, Mon1, Monitor, 1
secW:= (Mon1Right - Mon1Left)
secH:= (Mon1Bottom - Mon1Top)
SysGet, Mon2, Monitor, 2
priW:= (Mon2Right - Mon2Left)
priH:= (Mon2Bottom - Mon2Top)
WinGet, TempWindowID, ID, A
	scridx := GetMonitorIndexFromWindow(TempWindowID)
		;MsgBox, 0,, %scridx%
	If (WindowID != TempWindowID)
		{
			WindowID:=TempWindowID
			WindowState:=0
		}
	If (WindowState != 1)
		{
			WinGetPos, WinPosX, WinPosY, WindowWidth, WindowHeight, ahk_id %WindowID%
			WinSet, Style, -0xC40000, ahk_id %WindowID%
			If (scridx = 2)
				{  
					WinMove, ahk_id %WindowID%, , 0, 0, priW, priH
				}
			If (scridx = 1)
				{  
					WinMove, ahk_id %WindowID%, , -secW, 0, secW, secH
				}
			;Hide Windows Task Bar and Start Button. (Remove the following two lines if you don't want that behaviour)
			;WinHide ahk_class Shell_TrayWnd
			;WinHide Start ahk_class Button
		}
	Else
		{
			WinSet, Style, +0xC40000, ahk_id %WindowID%
			WinMove, ahk_id %WindowID%, , WinPosX, WinPosY, WindowWidth, WindowHeight
			;Show the task bar again
			;WinShow ahk_class Shell_TrayWnd
			;WinShow Start ahk_class Button
		}
	WindowState:=!WindowState
return