Apple II graphics debuted on the original Apple II in 1977 and were used throughout the computer series of the same name. There is a 16 color 40 × 48 mode and a 280 × 192 mode where visuals are dependent on artifact color. Both modes can optionally have four lines of text at the bottom, reducing the vertical resolution. The Apple IIe adds "double" versions of each of these, most prominently "double high-resolution" with twice the horizontal resolution in 16 colors. Internally, Apple II graphics modes are idiosyncratic and do not use a linear frame buffer.