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In cases when the document is shorter than the full screen, Page Up and Page Down often have no visible effect at all. Operating systems differ as to whether the keys (pressed without modifier) simply move the view – e.g. in Mac OS X – or also the input caret – e.g. in Microsoft Windows.
The scroll wheel is placed horizontally between the mouse buttons and commonly uses vertical scrolling, wherein rolling the wheel from the bottom side to the top is known as scrolling "upward" or "forward", while the reverse, i.e. rolling the wheel from the top side to the bottom, is known as scrolling "downward" or "backward".
Scrolling can be controlled in other software-dependent ways by a PC mouse. Some scroll wheels can be pressed down, functioning like a button. Depending on the software, this allows both horizontal and vertical scrolling by dragging in the direction desired; when the mouse is moved to the original position, scrolling stops.
Examples of horizontal and vertical scrollbars around a text box Examples of vertical scrollbar at right end of Wikipedia home page. A scrollbar is an interaction technique or widget in which continuous text, pictures, or any other content can be scrolled in a predetermined direction (up, down, left, or right) on a computer display, window, or viewport so that all of the content can be viewed ...
Omnidirectional scrolling can be performed in various document viewers including web browsers and PDF readers by middle-clicking and moving the pointer in any direction. This can be done by holding and scrolling until released, or by short clicking and scrolling until clicking once more (any mouse button) or pressing the Esc key. [3]
direction Sets the direction of the marquee box. Values are left, right, up, down where the value indicates the direction of travel. direction=left therefore moves the text from right to left on the screen. width This sets how wide the marquee should be. loop This sets how many times the marquee should 'Loop' its text. Each trip counts as one loop.
After the success of Windows 3.10, however, Microsoft abandoned the project in favor of Windows. After that, the Microsoft project for a future OS/2 version 3 became Windows NT , and IBM made a complete redesign of the shell of OS/2, substituting the Presentation Manager of OS/2 1.x for the object-oriented Workplace Shell that made its debut in ...
Pressing the Scroll Lock key in the Linux console while the text is scrolling through the screen freezes the console output (but not input) during which no further text is sent to the screen, while the program continues running as usual, or become blocked at the write syscall when too much data prevented from reaching the terminal caused the tty's output queue to become full and the tty file ...