To specify custom margin settings for a report, you:

D$.$ You cannot specify custom margins for an Access Report.

C$.$ Click the Page Setup button on the Ribbon while previewing a report and then type in your desired margin settings under the Print Options tab.

B$.$ Click the Page Setup button on the Ribbon while previewing a report and then type in your desired margin settings under the Margins tab.

A$.$ Click the Margins button on the Ribbon while previewing a report and then type in your desired margin settings.