Zentangle is a trademarked method of systematically drawing pre-established and often repetitive patterns within random shapes. Unlike doodling, full attention is given to the purpose of drawing something specific even if it is abstract.
Doodling is an art as old as history and often includes drawing random, abstract lines and patterns while letting the mind wander. Zentangle approaches doodling in a more constructive, guided way in order to keep the full focus on drawing. The goal with Zentangle is to release the mind of other thoughts and worries. Both methods of drawing have been considered therapeutic. Much controversy has arisen over how the creators of Zentangle have tried to trademark an activity that has been done for centuries.