How to add my company logo in customer portal?

You can upload the logo in the Company Details setting.

Follow these steps to add a logo:

1. Click your display picture on the top right corner of the screen.
2. Click Settings.
3. Go to Configuration.
4. Select Company Details.
5. Click the Edit icon on the top right corner of the Company Details page.
6. Click Upload under Company Logo.
7. Browse and upload your company logo.
8. Add other details of your company.
9. Click Save.

Note: You can access Settings only if you are an Admin user.