Go to the Settings page (the gear icon on the upper right of the screen).
Click on the the 404 Error Tracking tab.
1. Copy the code to your clipboard.
![](/desk/file/3845590/Swerve-404-tracking-blueprint.jpg)
2. In your BigCommerce Control Panel, go to Storefront > My Themes.
3. Click on "Edit HTML/CSS" for the Current Theme.
![](/desk/file/3845783/Swerve-blueprint-tracking-install-1.png)
4. Find the 404.html file in the left sidebar.
5. Paste the code near the bottom (immediately above the closing </body> tag) of the 404.html file and click Save.
![](/desk/file/3845784/Swerve-404-html-screen-2.png)
6. Click Mark Complete (in Swerve app) once added.