How do I save my signature???

I have just spent ages doing my siggie (I am Mrs. 'non' computer brain!!) All going well but I can't save my sig - what am I supposed to do once I am happy with it? Thx.

 At the bottom of the "tips" under the area where you can write your siggy- there's a "save" button. Just click that when you're done and it should be saved.

Thank you for that! It worked! Didn't realise the save button was so far away from everything else!!