I uploaded a photo from my pictures files for the theme picture. The picture comes up very small and i want to widen it to take up the space of the website theme image space. However, there are no tools to do that. Please help me because now it is just one little tile picutre at top of this giant space. I found some instructions that say to crop the picture and enlarge it, but there are no tools or editing features to allow me to do that. Thank you.