1. A method comprising: on a graphical user interface (GUI), displaying a first input field having a display width; activating the first input field in response to a stimulus; displaying, adjacent to the activated first input field, a second input field, the second input field having a display width greater than the display width of the activated first input field, wherein the second input field indicates a maximum display width of the activated first input field, the maximum width being equal to the display width of the second input field; and indicating a maximum amount of data allowed to be entered in the activated first input field by changing the display of the activated first input field or second input field when the maximum amount of data is entered, wherein the maximum amount of data is calculated based on the maximum width, and wherein the second input field corresponds to an image file including a grid of first coordinates and second coordinates, at least a portion of the first and second coordinates identifying one or more locations on a display grid that are illuminated to display the second input field.