I found the following: WordPress Standard in Settings/Media Settings ( Thumbnail, Medium, Large, and Full.) Then if applicable, Genesis Slider in Genesis/Slider Setting. Then Child theme functions.php by theme author are Featured Image, Featured Sidebar, Home Featured Posts, and Portfolio Thumbnail. Finally, there are the the additions in Child Theme functions.php by site administrator. The various locations can be confusing, but I have been able locate them. This, obviously, only applies to my install setup. Some of us come at a web site from a design, and not a blog or programmer vision. We are more obsessed with image control. Appreciate your theme and your help.