If you’ve got any interest in web development, take Safari’s Responsive Design Mode for a spin. Good to know it’s there.
To enter Safari’s Responsive Design Mode, select Develop > Enter Responsive Design Mode. As you’d expect, to exit, select Develop > Exit Responsive Design Mode.
Thanks! That is a great feature, and it even offers a lot more than immediately visible. Some of the device icons can be clicked to switch between portrait, landscape, slide over and split view (where applicable). Huge time saver.
I have been using Chrome for this very feature. Now I can do it also in Safari.