Set User As Practitioner
In the Setup Search box, search for “Manage Users”.
Click on “Users”
Click on your user record
Scroll down to Additional Information and check the box "Practioner". Then click Save.
Edit Custom Settings
Go to Setup
Search for Custom Settings or browse to Build->Develop->Custom Settings
Click the Manage action next to Company Config
Enter the Email and Website URL. Then click Save.
Click All Tabs (+ sign)
Click Documents Tab
Click the New button
Enter "PracticeLogo" for the Document Name and Document Unique Name
Check the Externally Available Image checkbox
Set folder to Public Images
Choose your logo file to upload