That's what I meant, yes. Partition or Volume - Create New
Please post back if you encounter any problems, if not, please let us know how things go.
Whatever you do, don't touch your D drive as that is your factory-restored recovery partition supplied by Lenovo.
If you partition your C drive, and then restore your system from Lenovo's recovery image you would lose anything on the C drive including any partitions you have created.
If you haven't created any Lenovo recovery disks yet, I would strongly urge you to do so first in the event you want to restore back to the factory system when you first bought your computer.
Once you've created a set of Lenovo recovery disks, you could delete the recovery partition if you wanted the drive space.
Just remember that any factory restore takes longer when using recovery disks rather than the recovery partition.