The Layer Row
Each time we open a new image in Photoshop, the image opens in its own document and is placed on a single layer. Photoshop represents layers in the document as rows in the Layers panel, with each layer getting its own row. Each row gives us various bits of information about the layer. I only have one layer in my document at the moment, so my Layers panel is displaying a single row, but as we add more layers, additional rows will appear: