COMPUTER: from a gallery pic, click 3x on any pic to get to full size (pics are 4k -- they are reduced about 50% for the internet). Use browser back button 2x to go back.

PHONE: If necessary, pinch zoom the main thumbnail gallery to make all the low res previews larger. On any pic, tap once and can pinch-zoom to full resolution of the uploaded pic. Use the standard phone-button "back" button (for your browser) to go back.