I have developed Odoo forms containing images that are sometimes very wide (2000 px width or more). In Odoo 8 and in the first version of Odoo 10 that I used, it was not a problem to display those images in their real size in the form, although they were extending the window on the right side of the form.

I upgraded Odoo 10 a few months ago and I can't get the same result anymore. My images are systematically reduced to fit in the width of the form, which makes them too small. I need to keep their original size.

I have tried  to play with the form view: putting the image in a specific group, inside a sheet or inside a notebook page. I have tried to set the size as an option of the image widget. Nothing worked. Can someone help me?