To edit the appearance of your breadcrumb, go to Appearance > Styles > XenForo - UI.X > Style Property Groups > [UI.X] Breadcrumb. Move Top Control to Content will move any call to action buttons out of your breadcrumb and into the main content area. Show Home Crumb as Icon allows you to choose between an icon or text for your home crumb. Breadcrumb Separator Icons allows you to change the separators between your breadcrumb items to either an icon or text. Check or uncheck these boxes according to your preferences.
Your breadcrumb, by default, is at both the top and bottom of your page. To change the location of the breadcrumb, go to Appearance > Styles > XenForo - UI.X > Style Property Groups > [UI.X] Breadcrumb.You can chose which pages your breadcrumb appears on by checking or unchecking the boxes for Remove Breadcrumb on Index and Remove Breadcrumb on Forum Index. You can remove the bottom breadcrumb altogether by unchecking Remove Bottom Breadcrumb.