When you edit the image of a draft or a card, the picture slot of the template can hold several pictures: press Collage on the picture, pick a layout (two side by side, two stacked, three, four or six), and click each box to upload its picture. Drag a picture to move it inside its box and scroll to zoom it. The frame, the fade and the texts of the template stay as they are, and the post gets one finished picture.