How to fix camera aspect Ratio to 1024*1024 please guys some help me to fix it

[kishore3d]

How to fix camera aspect Ratio in render option  to render in  1024*1024 pixels image render n please guys some help me to fix it ..

[guest84672]

You will need to change this under "Settings".

[Speedster]

And be sure to lock the aspect ratio on the settings tab after setting the size, and disable "Adjust aspect ratio to backplate" in Edit > Preferences > General.
Bill G