The picture that graphically represents the times you use in windows is called an icon ( this is true for windows 7, assuming that was what you were referring to. I am not familiar with windows 8)
Explanation:
I would just say close the app and come back in after
Here's what I found
To use an aggregate device with Logic:
Open Logic Pro or Logic Express.
Choose Logic Pro > Preferences > Audio or Logic Express > Preferences > Audio and select the Devices tab.
Select the Output Device drop-down menu and choose the aggregate device from the list. ...
Click Apply Changes at the bottom-right of the window.
Maybe like 3-5 I think im right