The back button in v0.9.1 is just the browser’s back button, as that widget is missing from the PhotoStructure for Desktops UI.
Several beta testers have expressed confusion about how the back button works:
The first improvement suggestion that I have is to make the back arrow icon on the full screen image appears to invoke a backwards navigation action on the browser even though it would be more logical to make it return to the previous view. For example, if I click on an image to show it in the full view and then navigate with the screen edge icons to the next image, I expect pressing the back arrow to take me to the thumbnail list instead of the previously shown full view image
Suggestions about how to improve it include:
replacing the back button with an up arrow on the “asset view” that returns you to the last-viewed tag gallery (if this was implemented, this is what the ESC button would navigate to, as well)
replacing the back button on tag views to an up arrow, where it will navigate to the parent tag (this is what tapping the ESC button currently does)
So: do you find the back button confusing? Do you have other suggestions to improve this?