VirtualBox Guest Additions - openSUSE
Step 1 - Installing Guest Additions
From VirtualBox Manager launch openSUSE and login.
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From the Devices menu select Optical Drives and then select VBoxGuestAdditions.iso.
Select Open with File Manager.
Click the Execute button.
Enter the root password and click the OK button.
Press the Enter key.
Select the openSUSE logo lower left corner, hover over Leave and select Restart.
When openSUSE is up and running again, from the View menu select Full-screen mode.
Step 2 - Removing the guest additions CD/DVD
The guest additions CD/DVD can be removed from the optical drive.
In Full-screen mode, hover with the mouse over the centre lower edge.
Select the Devices menu.
Select Optical Drives.
If Remove disk from virtual drive is greyed out, no further action is required.
If Remove disk from virtual drive is NOT greyed out, select it.
Click on the Force Unmount button.