When opening a new Word file, the word will automatically set a one-inch page margin around each page. However, you can change the page margins to any different size with the steps below:
Step 1: Click the "Layout" tab in the ribbon;
Step 2: Click "Margins" in the "Page Setup" section;
Step 3: Select the margin configuration you want from the drop-down list;
Step 4: If you cannot find the configuration you like, please select "Custom Margins" at the bottom to customize your own margins;
Step 5: Click "OK" and you will see that the margins are changed.
You may need more attention if your word file contains more than one column, and not to make the margin too large to leave more spaces for contents.