It's a picture of a gel electrophoresis run. It's a pain in the butt, but if you haven't saved the gel, then you probably can't do much with it now... However, if it's for a presentation, you can add lines (in something like word or pages) to make your results clearer. Do not try to fix the gel using aperture because that will make the results invalid.
You will need to add numbers to the lanes as well, and from what I see, it seems like the left side of your gel ran a little faster than the right side, so it's not lined up with your ladder. Seems like what you see lined up with step 5 of your ladder is actually supposed to be lined up with step 4.
Overall, seems like either your electrophoresis machine is screwed up or whoever made the agarose screwed up.
I spent 3 years in a lab and got only 10 pictures which were publishable. If it's for a high school lab or something, you should be ok with what you have.
Good Luck!