Summarize this article in one sentence.
Firing up the app takes you to a screen with two buttons: The “Gallery” button and the “Create New” button.  The “Gallery” button allows you take a look at the posters you have created. The “Create New” button lets you create new posters. To begin, tap on the “Create New” button. Tap the blue ribbon with three horizontal bars for access to shapes that you can add to your new poster. You can select any of the different styles already available in the app, just tap on any one of them to select the one you want to use. Blocks with the small grocery cart on their top left indicate additional themes that are available for $0.99. A pop-up bar will appear asking if you want to add any photo from your photo album or take a picture with your camera. You can select any of the options to add a photo or you can leave the poster as is, without a photo. You can do this by tapping on the three horizontal bars at the bottom. Tapping the capital T button will allow you to insert or change texts. You can also change the font style, size, and color. Do this by clicking the plus (+) sign. When you like what you see, just press “Next.” The app will now give you various looks of the poster you created with different effects on each one. Tap the one that you like. When you’re done creating your poster, select “Save.”  If you don’t like what you created and want to make changes, you can click on “Go Back.” You also have the option to share your poster; just tap “Share.”

Summary:
View the home interface. Start creating a new poster. Add shapes. Add themes. Insert a photo. Adjust the brightness, contrast, or saturation. Add texts. Add another section box to the poster. Go over your creation. Select effects. Save your changes.