Text Properties Dialog "Margins" Page
This page lets you change your text object's horizontal and vertical margins. Setting these fields lets you increase or decrease the amount of space between your text object's borders and where the text will be allowed to print. Setting a left margin of 1 centimeter, for instance, means that text will start printing 1 centimeter to the right of the text object's left border, not 1 centimeter to the right of the label's border.
If you're settings margins for text on a CD or DVD label, the margins will affect not just the text's distance from the edges of the label, but from the edges of the label hole as well.