Described are thermoformed films or sheets comprising polyester compositions comprising polyesters which comprise a dicarboxylicacidcomponent having terephthalic acid or an ester thereof; optionally, an aromatic dicarboxylic acid or aliphatic dicarboxylic acid or esters thereof; 2,2,4,4-tetramethyl-1,3-cyclobutanediol; and 1,4-cyclohexanedimethanol. Data are received from a mobile device in an area. The device stores ST deviation statistics for multiple leads. The end of each line of pixels is determined on the basis of a parameter indicating page width. The sensing aperture passes a portion of the light emitted from the light outlet of the light to the light detector, such that the light entering the light detector has the predetermined shape.