If you’re looking to create a postcard in Photoshop, there are a few things you need to know. First, open up Photoshop and create a new document. Next, select the Rectangular Marquee Tool (M) and draw a rectangle around the image you want to use as your postcard. Finally, choose the Text Tool (T) and type in your postcard message. You can also add text effects like shadows and highlights to give your postcard an extra pop. ..