Adhering canvas to a panel involves using a suitable adhesive to attach the canvas to a rigid surface, such as a wooden panel. The recommended product for this purpose is GOLDEN Soft Gel, which can be used as an adhesive for wood to canvas (Source ID: 8). It is suggested to gesso both the canvas and wood surfaces to be joined for the best possible adhesion (Source ID: 8). This technique can be useful for artists who want to create a more stable and rigid support for their work, and can be particularly helpful when working with acrylic paints and mediums.