re: How can I save an image without white border? (jpg, bmp)
I doubt if you can. You will need to open the saved image in an image editor and crop it in there.
In Microsoft Paint, use the Select tool to drag a selection window to the corners, then "Image / Crop".
In Microsoft Office Picture Manager (if available), choose the crop tool and enter a pixel amount for the crop handles, then crop. If you zoom in, you can see when you've crossed the line from the white border into the logo.
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Windows 10 Pro (1903), 64-bit