Disclosed in one example is a method for interfacing with multiple social networks. More particularly, the invention concerns novel rosin-fatty acid vinylic polyamide graft polymer compositions that exhibit properties that make them useful as resins for improving the adhesion of water-based inks and coatings to plastic substrates. Preferably, d2\u03c6df2 is proportional to A2. Thus, in response to an operation input of a cursor switch, such a condition that the cursor can be moved along the rightleft direction is changed into another condition that the display item can be scrolled along the upperlower direction. The digital system containing a photo-sensor, an image storage area, a GPS system, a GPS database, a device to determine direction, and a processor. The microwave oven also includes a control panel in which soft touch switches using electrostatic capacity are substituted for membrane switches, allowing the control panel to be formed in various forms including a curved form.