How to Reduce User Interface Height v6.1.2.1

Hello Guys
Am new to Libre Office
I dont know How to reduce the Height of the User Interface
Kindly help me to resolve my issue
Libre Office Version

Which OS and Version do you use? Which Hardware (PC, Tablet) do you use?

Try turning off OpenGL. In the menu Extras>Options>LibreOffice>View there at “Graphics Output”.

Thanks for ur reply,
Am using Windows 7 PC and Libre Office Version,
OpenGL was already turend off