Cell Padding and Cell Spacing refer to the margin inside the cell and the separation between cells of a table. Cell Spacing specifies how thick the grid lines of the table cells will be. Border specifies how thick the outer frame of the table will be. A border size of 0 will give you a table with no visible gridlines. This kind of table can be used very effectively for page layout.
Different monitors have different pixel maximums.
An old monitor, for example, will not be able to display more than 640 pixels horizontally and 480 pixels vertically. Some of this space will be used up by the browser itself. Tables should not be more than 550 pixels wide as a general rule. Add your Content. When you are finished setting up your table, click 'OK' and fill the cells with your content by clicking on a cell and typing or pasting text or images.