All available breadcrumbs settings you may find in Theme Options > General > Breadcrumbs. If you want to use different breadcrumbs images for some pages instead of the image that were selected in Theme Options then go to Pages > edit page > upload featured image for your page and it will appear in breadcrumbs.
Also, every page has its own breadcrumbs settings, edit page and scroll down to 8theme – Layout settings > http://prntscr.com/gwfdca
