How to ADD LENSES TO PHOTOS in SNAPCHAT?

hello did you know that snapchat now lets you add lenses to photos so basically if you update snapchat app you will see this arrow like not arrow just like this lens icon on the right sidebar and then you will be able to to add all these kind of lenses to to your photos so there you have such a new interesting update um yeah if you're a fan of snapchat that can be helpful