can uvnc-viewer launch window in the main display monitor?

[kissson]

it is a windows 10 with monitor1 and monitor2
forgot to disconnect m1 cable when install windows.

now
m1 , number1 in settings>display , 1440x900 , my secondary monitor
m2 , number2 in settings>display , 1920x1080 , main display with tray area, where i work

the problem is where incoming connection will cause the windows launch on monitor1 rather than main display.
and the area below 900 pixel height remain black area unusable even after move to main display resized larger.

searching around can't get any hints to switch monitor numbers with proper method, or uvnc viewer is behave as expected?

thank you anyone help or make suggestion

[Rudi De Vos]

viewer connect window
bottom
1. display X
2. display Y
3. Both

Select your startup display , [v]save connection settings as default, press connect

Now, your selection is used as default and should start direct on your preffered monitor

[kissson]

woo, work very WELL
because I start vncviewer listening mode by a bat
start %USERPROFILE%\Desktop\app\winvnc\uvnc_1216_X64\vncviewer.exe /listen 59000 /viewonly /disableclipboard /64colors /encoding tight
and before I didn't know i need to change it in the gui