Lumia 640 - Usage - Camera Functionality?

[Descolada]

This is probably a noob issue but I can't figure it out.

If I take a photo with my Lumia 640 and then go to the camera roll to review, I have the options to share, edit and refresh, but I can't for the life of me figure out how I get back to the camera from this screen?

Can anyone please give me a pointer on how to do this?

 

[Harrie-S]

Push the <-- back key (bottom left where also the windows and search key is)