[Zubersoft]

Are you referring to the library window? Does it have a dropdown at the top that lets you switch the active tab/section? If so, there is an X at the top right that you can tap the close it. If you want to bring up it back up, bring up the song overlay, tap the icon at the bottom left and tap "Show library window". You can also trigger this a touch or pedal action, or assign it to the right icon in the quick action box.

Mike