How do you set the margins when creating a document on the computer?
custom margins command
To set the left & right margins... Click Format > Page > Page > type values for your margins in the relevant boxes > OK Alignment is defining where on the page that text will line up. Tex normally aligns to the left margin - however, you can align to the right margin or even centre each line on the page.
In most applications you want to print something. On a page you need to know the working area of the page. You set margins to define that area. Sometimes you may adjust margins in order to make the working area of the page bigger so that you can fit more onto the page. You should always have some margins to enable you to do things around the edge of the page like bind pages or…
Open the document you want to change. Click Format, then Page. Select Border. Just under where it says 'Line arrangement' - choose the box (2nd from the left). Choose the style of the border from the Style list and click OK. That places a border around the whole page - at the place where the margins are set. If you subsequently need to change the margins, the borders will move with the new settings.