1. Navigate to the document library. At the bottom left of the page, click **Return to classic SharePoint**.

2. Click the **Settings** (gear icon) > **Edit page**.

3. Under **Page** tab, select **Make Homepage**.

4. In the prompt window, click **OK**.

5. You should see **This page is now the site homepage**.

6. Still under Page tab, click **Stop Editing**.

7. Below the Quick Launch (or side navigation), click **Exit Classic Experience**.

# Source
[[Customisation] How to make a document library the default site homepage – IT Services & Help (smu.edu.sg)](https://itsupport.smu.edu.sg/hc/en-us/articles/360033229674--Customisation-How-to-make-a-document-library-the-default-site-homepage)