We’re going to use guides in order to set out our layout. In order to set a guide, go to view>new guide and then specify either horizontal or vertical, as well as a distance for your guide. The default guide setting is in cm, but you can simply type in px.
To start with we’re going to set out our main content area’s width, and so set vertical guides at 90px and 990px. This will mean that we have a 900px wide content area, which is 90px away from each side of your canvas.
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