Right now I am using the Yosemite theme for my website. I am new to Concrete5 and I cant seem to figure out how to change the main image on the top banner (the big lake next to the cliffside). Any help is appreciated.
The image is in the theme's images folder. You'll need to replace it there instead of through Concrete. If you open your theme_yosemite folder - then themes - then yosemite - then the images folder... you'll find it labeled as img06. This can be replaced by another image of your choice sized to 980 x 270 px
(if you've downloaded the theme to your desktop, it'll be easier to edit. Otherwise just ftp upload the new photo to your theme in the packages folder so it overwrites the original)