When I render my scene with custom dimensions ( lets say 1920px x 1920px ( 1:1 ) ) and my perspective viewport is not the same dimensions, some parts will be cut off in the final rendering. Or if the dimensions are smaller than the viewport I never know what the final rendering will look like and I find myself fiddling around and press render again and again to set the view by eye.
Is there a way to preview the very final rendering view with its dimensions I just configured?
I know in the software Blender3D you can see a border that indicates the width and height of the picture you are about to render, when you look through the camera. There must be a better way to set the render view than to set it by eye, right?
Thank you for helping