From featured Slider to article

Hi! First of all: Thank you a thousand times for this great theme. It's nearly perfect. I'm creating a new website at the moment and have at least two questions left: 1. I love to use the Featured Slider. But when I put in a picture in 1140x450px as it fits perfects for the Slider, it doesn't fit anymore in the article anymore when it's open. You see only the medium part of the picture then. Is there any solution for that problem I haven't seen yet? 2. I haven't found a way yet to add captions to the main picture of he article. But in terms of copyright in some cases it would be better to be able to name the source/photographer. Is there any solution, too? Thanks a lot and best regards, Fabian