What do you call the cross with arrows on each end image that comes on only when your cursor is within the screenshot you captured/trying to capture?

I see this image when I am in the process of capturing an image normally. I see it if the curser happens to be in the screenshot, I don’t know if that is supposed to happen or not – It doesn’t interfere with the capturing of the screenshot. And just yesterday and today while composing email, I am finding it. I am hovering the cursor over an emoticon that I already placed where i want it. If I click on it I get little squares around the emoticon which is supposed to help enlage it when clicked on, the enlargement isn’t happening as a result of the presence of the cross, it seems to me. What could I have done to make it appear, and how do I reverse it?