How to save and move photos that are attached in received messages ?

Hello, everybody,

I have an Aquaris E5 HD with Ubuntu OS.

My sister sent me a message with attached pictures.

How to save these pictures on the phone (and then move them to the computer) ? I need these photos.

When I am in the conversation (of messages), I see the photos.

I can select one photo and/or a group of five other photos.

But I see only one option to with these photos : delete them. I don't see an option "save".

Can you help me to save them on the phone ?

Thank you in advance.

If it's not possible, I'll ask her to send me these photos by mails.

[I don't use to share pictures in messages with my phone.]