You can add or change your logo by hovering over your organization's name in the upper right corner and clicking on Account. You will then see the current logo or generic image on the left corner of the page.
Below the image, click “Update Company Logo” to select a logo that is saved on your computer. Once you select the image you want to use and click open, this will replace the image that was originally there. You can change your logo at any time and as many times as you would like by repeating these steps.