James Gurney | Quick Release Plates and Artist's Easels @JamesGurney | Uploaded May 2017 | Updated October 2024, 25 minutes ago.
Many modern easels attach to camera tripods using a quick release plate. You can make a much secure mount if you buy an additional plate and screw it semi-permanently into the base of your easel.

Sample from the instructional video "How to Make a Sketch Easel"
Download available at Gumroad: gumroad.com/l/sketcheasel

Also, check out "Gouache in the Wild": gumroad.com/l/gouache
and "Casein Painting in the Wild": gumroad.com/l/casein

Gurney's videos also available as DVDs: kunaki.com/mSales.asp?PublisherId=136361