Hotkeys

• a - toggles auto-next (play/pause)
• t - collapse/uncollapse title
• c - collapse/uncollapse controls
• i - open image in a new tab
• r - open comments in a new tab
• u - open user slideshow in new tab
• f - toggle full screen mode
• m - toggle sound
• g - skip gallery
• h - share this slide (system share sheet, or copy the link)
• Arrow keys, pgup/pgdown, spacebar change slides
• Swipe gestures on phones

Used redditp before? Everything that changed, and what did not.