Record Owner Change <Video>
The Record owner is the user who owners the record.
By default record owner is the user who created the record.
A record owner, or any user above the owner in the role hierarchy, can transfer a single record to another user.
To change the owner of a record:
Select New Owner page
1. Enter the Owner (name of the user or queue to which you would like to transfer the record. - Use the look-up if desired)
2. Alternately, Select the Send Notification Email checkbox to notify the new owner. (The “From” email address displayed in the notification is your return email address as set in the Email Address field of your email settings.)
3. Click Save.
For more informtion see Force.com's Changing Ownership