The extension of a Canadian temporary resident visa is called Visitor Record, which is used to maintain status in Canada and cannot be used for entry and exit (except going to or from the United States).
Category: Overseas Visitor Visas/Extensions
Post-Graduate Work Permit / PGWP
The Post Graduattion Work Permit, often referred to as PGWP. After studying in Canada, international students can apply for a graduation work permit of 1-3 years according to their length of study.