The margins should put any declarations of margins: margin, margin-top, margin-right, margin-bottom, margin-left.
In the context statements do not use units of “em” (font height) or “ex” (height of a lowercase letter), because there is no concept of the font.
Context defines the look of the site – such as a sheet of paper to print – and not its contents. CSS 2 allows you to determine in this way only the margins. The difference between the margins in the context of a traditional borders is that even if the standard margins are reset, the output can still hold them. Normally, to change thesize of the margins on the printout, the user must change it manually in your browser- usually on the menu: Print / Page Setup. But we can already point out the CSS toalso print margins were zero. We must be aware that most printers do not allow the typical print the entire surface of the paper, so there will always be the minimum margins – how much depends on the specific printer model.
Defining the margins in the context it is necessary to note that the visible area of the first page of a block comprising the initial set of the document. In practice, this means that subsequent pages should not be larger margin than the first, because then the content can be cut!c