Use instead the menu FILE PAGE SETUP to set overall margins.

It is possible to set the indents for a style in FORMAT PARAGRAPH
Thus if my Normal style has indents of 1" and my page margins are set
at 1.25", my normal paragraphs will actually appear to start at 2.25"
from the edge of the page.

If I know that the page margins are set at 1.25" I could set the Normal
paragrah to have indents set at "minus point 25 inches" (that appears
as -0.5") so that they start one inch from the page but I think you
will find that using FILE PAGE SETUP is the better way