Home Forums Mac Software Mac Applications Icon view, some showing thumb, some not

I might have an idea about the icon view. If you click on a file, then command-I (get info), what is written under open with? Is there any difference between the "image icon" files and "text icon" files? If yes, choose an "image" file, get info on it, see which app opens it, then go to get info of a "text" file, choose the same app and then click "apply to all". Maybe you get all icons in order.