Methods of operating mobile or other electronic devices so as to achieve a transmission of data between those devices, and related systems and components, are described. In one exemplary embodiment, a method of operating a first mobile device so as to achieve a transmission of data from the mobile device to an additional electronic device includes tracking a positional variation of an object situated proximate a display screen of the mobile device by determining locations of the object over time using a sensing assembly of the mobile device. The method further includes determining a point or region on the display screen based upon the tracked positional variation of the object, identifying an image portion corresponding to the point or region, where the data is associated with the image portion, and transmitting the data from the mobile device, whereby the data is capable of being received by the additional electronic device.