When I begin working with an image, I want to determine what size and what layout-- portrait or landscape-- to use. It can be challenging to determine when looking at just the image.
By simply laying the sleeve over the printed image, I can determine if the size and the layout are what I'm wanting.
The black frame blocks out all the noise around the image, allowing our eyes to focus on just the image-- it's size and its position within the LTC parameters.
Which layout & image position appeals to you?
Some layouts offer more or less white space to explore additional media. Often, I pay attention to where my eyes want to go on the card and how my eye movement affects the interpretation of the content. As I explore adding additional media, I consider how each element affects the tone I want to convey or the mood the observer might experience.