Follow the steps below in order to change the default Website Logo that comes loaded in the default Canvas installation:

1. Login to your Canvas Administration area
2. Go to "Site > Media Manager" and upload your own company logo to one of the directories available
3. Go to "Extensions > Module Manager" and find the "Logo" module and click on it to open the edit page
4. While in the Edit page for the "Logo" module, scroll down to the "Custom Output" section. Click on the "Souce" button of the Wysiwyg editor and change the path to the image there to the new image you uploaded.
5. Scroll back up to the top of the page and click on "Save"
6. Go back to your website home page and refresh the page. The new logo should appear.

Note that depending on the dimensions of your new logo, the website header may appear out of place or distorted. The recommended image size for your logo is 267 px wide x 66 px tall. Making your logo much bigger than that will likely push other things on the page out of place.