To show formatting marks in Microsoft Word, you can use the "Show/Hide ¶" button, which is located on the Home tab in the Paragraph group. Clicking this button toggles the display of formatting marks such as spaces (dots), paragraph marks (pilcrow ¶), tabs (arrows), and other non-printing characters on or off in your document. Alternatively, you can go to File > Options > Display, and under "Always show these formatting marks on the screen," select the checkboxes for the specific formatting marks you want to always display regardless of the toggle button. You can turn this feature off by clicking the button again or clearing the checkboxes. You can also use the keyboard shortcut Ctrl + Shift + * to toggle the display of formatting marks on and off. In summary:

• Click the Pilcrow (¶) button on the Home tab to show/hide formatting marks.
• Or go to File > Options > Display and check the formatting marks you want always shown.
• Or press Ctrl + Shift + * as a keyboard shortcut toggle.

These formatting marks help see spaces, tabs, paragraph breaks, and other hidden formatting symbols to assist with document layout and editing without printing the marks.