margin left latex code example

Example 1: latex page margin

\usepackage{geometry}
 \geometry{
 a4paper,
 total={170mm,257mm},
 left=20mm,
 top=20mm,
 }

Example 2: latex top margin bottom margin

\usepackage[right=1.0in, left=1.0in, top=1.2in, bottom=1.0in]{geometry}