How to assign different page layouts to specific users in Salesforce?

From Setup, enter Profiles in the Quick Find box, then select Profiles.
Select a profile.
Click View Assignment next to any tab name in the Page Layouts section.
Click Edit Assignment.
Use the table to specify the page layout for each profile. If your organization uses record types, a matrix displays a page layout selector for each profile and record type.
Selected page layout assignments are highlighted.
Page layout assignments you change are italicized until you save your changes.
If necessary, select another page layout from the Page Layout To Use drop-down list and repeat the previous step for the new page layout.
Click Save.