This layout is one of the PenTile matrix family of layouts. Interface aspects such as fonts, color palettes and graphical layouts can influence acceptance. The file system provides extensibility through template-based metadata definitions using generic layouts and generic patterns. CSS tables permit hybrid fixed+fluid layouts. Letter frequencies also have a strong effect on the design of some keyboard layouts. Occasionally, stickers were provided to place over the keys for these layouts. There are different methods of planting and thus different layouts. They follow one of two different layouts. Each track is available in two different layouts. Certain virtual keyboards and keyboard layouts are accessible online. There are two systematic compact layouts for a two-dimensional array. TriPeaks was created to allow for other layouts. There are many other layouts for English, each developed with differing basic principles. It is based on ideas from the Dvorak and other ergonomic layouts. The game also adds varying terrain height, allowing for more interesting map layouts.