Input Devices, ContinuedFunction keysFunction keys are special-purpose keys, numbered F1 through F10, used tocommunicate specific fictions to the operating system. These keys simplifytasks that might otherwise require several key strokes. These keys can alsobe used with other keys to increase the number of functions available. Thesoftware program in operation defines the function of these keys. Be sure toread the software owner/user manual to understand the purpose of these keys.These keys are generally located at the top of the keyboard.Cursormovement keysCursor control keys move the cursor from one place to another on the displayscreen. The cursor is the indicator on the display screen that lets the userknow where the next entry will be made. Cursor control keys have anarrowhead printed on them pointing in the direction that the key will move.Some keyboards have a separate set of keys for cursor movement; othershave the cursor movement keys incorporated into the numeric keyboard. Aslong as the NUM LOCK key is OFF, the cursor movement keys function.Some software packages use the cursor control keys in combination with eachother or with other keys to increase the number of ways and the speed withwhich you can move the cursor. Another cursor movement key — theSCROLL LOCK/BREAK key – controls screen scrolling. When in theBREAK mode and used in conjunction with the CTRL key, the SCROLLLOCK key will interrupt program execution.Figure 3-1 shows cursor movement keys.Figure 3-1. -Cursor movementkeys.Continued on next page3-7
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