Input focus

At runtime, an object in a graphic display has input focus when it is active and ready to receive input from the mouse or keyboard. Some objects, particularly those that take keyboard input, such as string and numeric input objects, and those with an object key list attached, need to be selected by tabbing to them or clicking with the mouse to activate them.

At runtime one of these objects always has input focus. Pressing the Tab key will move to the next. The order in which Tab moves between these objects is determined by their index number.