How do you flatten birch bark for crafts?

Birch bark on tree trunk in the forest. White and black pattern texture in a blurred woodland background. Close up tilt up.

Reverse side of birch bark, looking like landscape. Complex texture. Macro shot.

Smooth Bark Trees | 12 Types and How To Identify Them

Oldest birch bark canoe found in Maine museum

Indigenous group celebrates launch of birch bark canoe made entirely off the land

The lessons a canoe can teach about Indigenous history and culture