The ruler has a number of uses. It can show you the width of a working area of a page. It can show the width of text boxes or columns or cells in a table. It can be used for setting indents on the document. It can be used for setting margins. It can be used to set tabs, adjust tabs and remove tabs.
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in word processing, a line running across the display screen. It measures the page layout in points, picas, inches, or centimeters. It is sometimes called theruler line and is particularly useful for setting margins and tabs. Sophisticateddesktop publishing systems and page layout programs sometimes supportmovable rulers that you can move around the display screen to measure particular items of text or graphics.
It has many uses. It helps determining the width of the working area of the page. You can use it to help position tabs and indents to particular positions. You can use it for setting widths of cells in tables and the overal table size. It indicates where the margins are and the size of the header and footer areas. So the ruler is very helpful for structured documents that you want to have set positions or widths of items on the pages.
The rulers allow you to align slides correctly so the information stays in the same place. This makes for a more professional presentation.
Hi, ruler is guide for while you wish set a object (picture, text, artwork , etc) for real printed one of your documents