Hidden feature in Gallery app

[Zammi]

To enable Gallery Labs , Open the Gallery app, go to Settings/ About Gallery.

Tap faster on the version number for about 10-15 times (till get a message saying Gallery Labs enabled). 

That's it, it will be available in settings.

Explore the options available

[Zammi]

With these additional features, I can select multiple images and create a single PDF file out of them. Very handy 👍