When you add your own image into a design template, you can double click on it to move or crop the image.
For further editing, you can click on the "Edit Photo" icon in the top left corner to do basic adjusting, add effects, add strokes, or remove the image background, etc.
Meanwhile, on the top right corner menu, you can detach images, copy images, duplicate styles, rotate and flip, align, move layers, lock images and delete images. etc.
Hope that helps and any other problem please feel free to contact us.