@Anja0625: You have option to set different image for individual post if you have Catch Everest Pro Theme. There is option to select images from
slider: 1140px by 450px
featured: 690px by 462px
Original Full Image
To center the copyright line in the footer, you can add the following CSS in “Appearance => Theme Options => Custom CSS” box.
#site-generator .copyright {
text-align: center;
width: 100%;
}
Oh I though you were using the Pro version. But when I check in, I see that you are using Catch Everest Free Version. Note: You are not allowed to change the footer credit Theme: Catch Everest. This is only the means of recognition that we received for providing the free theme and free support. So, if you want to remove the footer credit, just upgrade to Catch Everest Pro and edit the footer text through easy to use Footer Editor in Theme Options panel.
For more information about Catch Everest Pro. See this http://catchthemes.com/theme-instructions/catch-everest-pro/