LO3- setting up Indesign

This is me setting up InDesign and setting up all the columns, gutter, margins and page size.
The page size is the same size as A3
Width= 420
Height= 297
Columns= 4
Margins= 12.7 Top, Bottom, Outside

This is the page design when it is actually up and running an what it looks like. The columns on the page are wear I will line up all the content also the margin is where I will not be writing on as that is the side of the page. The gutter is spaces in-between the columns so then I know where to put some of the content.