I don't know how to do what you are asking. I thought I uploaded the image with the proper dimensions. Should I just remove it and resize it and upload again?
Update: Yes I just checked. All of the images are 1000 x 500.
Update: I figured out how to use the editor and locate #slider. I have changed the max-height from 600 to 500, saved the file but now the images do not slide.
border-bottom: 1px solid rgb(213, 213, 213);
background-color: rgb(255, 255, 255);
box-shadow: 0px 0px 3px rgba(0, 0, 0, 0.1);