I am trying to figure out the meaning of all the photo editing buttons in Gallery app in my sg9.

[Android Central Question]

For instance how to change the paint color under the paint pallet button...

 

[UdiBerry]

Open a photo in the gallery, tap the paint pallet, on the right side you'll see a bar with all the available colors. Slide your finger to choose a color, or tap the bottom of the bar to open a color wheel and find even more color options.