![]() (US keyboards just have a second Alt key in this position). These keyboards have another modified key, labelled AltGr (alternative graphic), to the right of the space-bar. In most languages except English, additional letters (some with diacritics) are required and some are present as standard on each national keyboard, as appropriate for its national language. The Latin alphabet keyboard has a dedicated key for each of the letters A–Z, keys for punctuation and other symbols, usually a row of function keys, often a numeric keypad and some system control keys. The ⇧ Shift key is also used to type the upper of two symbols engraved on a given key, the lower being typed without using the modifier key. To facilitate this, modifier keys usually come in pairs, one functionally identical key for each hand, so holding a modifier key with one hand leaves the other hand free to strike another key.Īn alphanumeric key labelled with only a single letter (usually the capital form) can generally be struck to type either a lower case or capital letter, the latter requiring the simultaneous holding of the ⇧ Shift key. Typically, a modifier key is held down while another key is struck. (Apple keyboards have differently labelled but equivalent keys, see below). For example, the ⇧ Shift key can be used to alter the output of character keys, whereas the Ctrl ( control), Alt ( alternate) and AltGr ( alternative graphic) keys trigger special operations when used in concert with other keys. It was equipped with four keys for bucky bits ( Control, Meta, Hyper, and Super) and three shift keys, called " shift", "top", and "front".īesides the character keys, a keyboard incorporates special keys that do nothing by themselves but modify the functions of other keys. MIT " space-cadet keyboard", an early keyboard with a large number of modifier keys. The positioning of the character keys is similar to the keyboard of a typewriter. Typically, there are three rows of keys for typing letters and punctuation, an upper row for typing digits and special symbols, and the Space bar on the bottom row. The core section of a keyboard consists of character keys, which can be used to type letters and other characters. However, differences between national layouts are mostly due to different selections and placements of symbols on the character keys. There is some variation between different keyboard models in the physical layout-i.e., how many keys there are and how they are positioned on the keyboard.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |