On my Samsung Galaxy J3, the default Gallery app grouped pictures by date. Then a few days ago it switched to displaying them in one huge lump. I clicked around and couldn't find anything in the Settings that would make it change back. At some point I did something that made it group by month, which is its present state, but I don't know what. I've Googled stuff like <android "photo gallery" "by date">, but no luck. Some places said to click on Menu at the bottom of the screen, but there ain't no such animal. Help! TIA.