Images shows

You can also select all the images you want to look at in your folder in finder (select first then with shift select last in the list), then right cick and open with preview. You will be able to use the arrow keys to go through your selection, even in full screen. Make sure the options in preview are set to view groups of images in the same window.

Hi,

select the first picture in your folder and hit the spacebar. That opens quickview. You can then walk through your folder with the arrow keys. It does not work in full screen.

Hope it helps.