To make your logo visible on your invoice, you will have to upload your logo on to the organizational profile of your Zoho Books account. To upload your organization logo: Login to your Zoho Books account and click on the Gear icon present on the top right corner of the page. Select the Organization Profile option. Click on the Upload your logo option to upload your organization’s logo from your computer. Kindly make sure that the preferred image size for your logo is 240px x 240px @ 72 DPI (Maximum size of 1MB.) Once you upload your logo, click on the Save button for the changes to take effect. Now, your organization logo will be visible in all your transactions.