[PrimeDirective]

This is not exactly it. What I meant was, something what IrfanView does: when you open an image (or any file the program can read), you can press a button to open the (alphabetically?) next or previous image in the same folder.

Looks like Preview only has this, when you select all files and open them (Cmd+O). Wish it was like IrfanView.

[Jcowell]

I’m confused here , so like if you’re in a folder with a file selected and hit the space bar , does pressing the arrow keys not preview the next file for you ?

[PrimeDirective]

It does not

[vondro]

Try up/down arrows, not left/right.

[PrimeDirective]

Nope, does not work.