1. A method, comprising: by an image capture module of an electronic device, receiving an image of a symbology captured by an imaging device of the electronic device; on a display of the electronic device, displaying the image of the symbology; by a processor, selecting a boundary indicator that represents an optimal focal distance of the imaging device, wherein the selected boundary indicator corresponds to a size and a type of the symbology; on the display, displaying the boundary indicator as a graphical representation of a distance from the symbology at which the electronic device may be positioned to achieve a clear image; determining whether the boundary indicator corresponds to a boundary of the displayed image of the symbology by determining whether corresponding sizes of the boundary indicator and the boundary of the displayed image fall within an acceptable size range that allows the boundary indicator to be a certain size larger and a certain size smaller than the boundary of the displayed image of the symbology; if the boundary indicator does not correspond to the boundary of the displayed image, automatically adjusting a focal length and aperture of the image capture module until the boundary indicator corresponds to the boundary of the displayed image; when the boundary indicator corresponds to a boundary of the displayed image, decoding the symbology to yield decoded information; and using the decoded information to initiate an action by the imaging device.