How To Change Logo in Magento Theme (Fortis):
1. Click on “System -> Configuration -> Design” (In Admin Panel)
2. Click on “Header” Tab
3. View “Logo Image Src” where logo name is mentioned.
——————————-| Now |—–>
1. Go to “skin/frontend/fortis/default/images”
2. Logo File is here with the same name.
3. Now Upload new Logo with same name.
——————————————————–
You can create new logo name but you have to change in “System -> Configuration -> Design -> Header -> Logo Image Src” Also. 🙂