Property Reference - CSS Reference - page 216

Name
margin-left
Values:
<length> | <percentage> | auto
Initial value:
0
Applies to:
All elements
Inherited:
No
Percentages:
Refer to the width of the containing block
Computed value:
For percentages, as declared; for length values, the absolute length
Description:
Defines the width of the left margin for an element. Negative values are permitted, but caution
is warranted (see margin ).
Examples:
p {margin-left: 5%;}
pre {margin-left: 3em;}