To access the action menu:
Swipe the screen vertically for the menu to appear or
Volume Down key on phone or remote Bluetooth controller/keyboard
To advance to next photo in alphabetical sequence use one of the following
Swipe screen right to left
Tap or click screen
Right arrow button on remote Bluetooth controller/keyboard
Enter key on remote Bluetooth controller/keyboard
To view the previous photo
Swipe left to right or
Left arrow button on remote Bluetooth controller/keyboard
To bring up Android navigation bar to exit the app, use one of the following
Swipe from top edge of screen, or
Swipe from right side edge of screen or
Use EXIT menu option
To start slideshow (Stereoscopic mode only)
Use action menu Start Slideshow option
To stop slideshow (Stereoscopic mode only)
Tap screen or
Back button on Android navigation bar or key on a remote Bluetooth controller/keyboard
To show first photo in a folder
Home button on a remote Bluetooth controller/keyboard
To show last photo in a folder
End button on a remote Bluetooth controller/keyboard
To swap left and right images on the screen
Press Media start button on phone if available, or key on a remote Bluetooth controller/keyboard or
Use Settings option to swap left and right eye images.
To view a 2D photo
Change Settings option to not split photo image into left and right images, choose non stereo mode.
To enter Cardboard VR mode
Select Cardboard VR menu item or
Long press the screen when the Settings option is checked
To use the Camera cha-cha feature
Start your camera app with one of the following:
Select Camera Cha Cha menu item
Press camera key on phone if available
Press volume up key. A remote controller volume up key also enters Camera cha-cha mode.
The camera app you use is your choice, for example, another alternative to your built-in camera app is Open Camera,
https://play.google.com/store/apps/details?id=net.sourceforge.opencamera&hl=en
To Swap between 2D and 3D photo presentation in Cardboard VR mode
Press volume down key. This feature is for photos that are not 3D, so you can view in a stereoscope or Cardboard VR headset.
3D/VR Stereo Photo Viewer Navigation
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Tekla Inc
3D/VR Photography Apps for Google Cardboard Android
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