Answer: doodled

AnswerCrossword Clue
DOODLED

Did a random drawing?

DOODLED

Drew upon one's notes?

DOODLED

Scribbled idly

DOODLED
Scribbled or drew idly.
DOODLED
Scribbled at a board meeting
DOODLEDDrew aimlessly
DOODLEDDid some edgy writing?