The content provides a tutorial video link and MATLAB code for combining two images either horizontally or vertically using App Designer. The source code defines a class ‘MergeImage’ with properties for the images and a ‘Merge’ button. The function ‘MergeButtonPushed’ reads the source of two images, merges them, and assigns the result to a third image component. Another function ‘createComponents’ constructs the UI Figure and its components (the three image components and the merge button). The code covers not only the creation of the app but also how to delete UI Figure when the app is deleted.