Line spacing is the gap between text lines. A line spacing of 1 indicates that the line spacing will be the size of one line, a line spacing of 2 indicates that the line spacing will be the size of two lines, and so on. Singleline space is used to indicate a line space equal to the width of one character (space or no-break space). This is done by placing a single hyphen character at the beginning of the paragraph where you want the line space to occur. For example, if you wanted to create a bulleted list with three items, you could do so like this: "* first * second * third". You can see that there is a line space after each item in the list. If you wanted all the items in the list to be on one line, you could use a line spacing of 1.5 instead. In HTML, you can use the CSS property 'text-align' to set the alignment of multiple consecutive sentences/paragraphs. For example, if you wanted to align the paragraphs in the above code sample, you could do so by adding the following rule to your stylesheet: "img {float:left;margin:10px} p {text-align:right}". This would cause all the images to sit on their own line, followed by a right-aligned paragraph.