Sketching in MN4 Mindmap Space

Hi,
I was able to sketch in MN3 Mindmap space, which make it really easy to draw out diagrams in class. But in MN4, I could only draw in the document, and the pen tool in Mindmap became just a purple highlighter. Am I missing something? How do I sketch in MN4’s Mindmap?

MN3:

MN4:

Sorry to revive an old thread, but for anyone with this same problem: this toolbar lets you change the tool you sketch with.

To turn your sketch into a MindMap card, select it with the rectangular selection tool and select “Create card”