Stroke of Sign Pen
Stroke of Brush Pen
Stroke of Colour Brush

Scribble

'Doodle' comes from Anglo-American English and means literally, 'to smear' or 'write unclearly'.

Doodling is typically used in advertising language and means getting the 'creative juices' flowing.

In the advertising industry, visuals are often made freehand during brainstorming sessions.

Compared to a sketch a doodle is not a final idea.

Doodles are often used for first drafts of  illustrations, announcements, layouts and posters etc.

Here are some Pentel products which are suitable for doodling;