I am adding my +1 to this feature request. For several years I did not care about thumbnails too much, but now that I am using Evernote for cooking, correct thumbnails have become essential. I grab screenshots of recipes. I take cell phone pics of the finished product. Both go into an Evernote note. Because I don't want to print two pages next time I make the recipe, I prefer to size the photo smaller than the recipe screenshot. Unfortunately, EN's algorithm then pics a random area of the recipe text as my thumbnail....NOT useful at all. The "largest smallest dimension" algorithm m