How to share photos in iOS7?

Last night, I did NOT have the Mail option when I clicked Share after selecting a couple of photos -- today, for no known reason, I do.

I hate this upgrade.

I am not sure about the issue of the options disappearing and reappearing, but to share/email photos you will open the photo you wish to share/email and tap the symbol in the bottom-left corner of your screen. This will also allow you to scroll left or right select additional photos at the same time. Once you have selected all of the photos you want to will tap "Next" in the top-right corner of your screen and your list of sharing options will appear. Select the one you wish to use and then everything seems to be set up as it was before from then on.

You can also tap "Select" in the top-right corner of your screen in camera roll or moments, or "Share" above whichever moment you wish in order to share/email multiple photos.