Google Images -re-size if needed
Canvas - sign up (if not) custom size thumbnail for 1920x1080 HD dimension or use the pre-made template size 1280x720 youtube etc.
Upload the pics - sharpen it up a bit ,add a shape make take simple and readable , not too much text. Custom Thumbnail Tips: Make the Best U...
Custom or use template examples if you want your pic in the thumbnail take some selfies with your laptop camera, iPhone -smartphone, iPad or...
Recap End Result -post in class projects (contact me for this) with saved png
