Best Answer: Well, if you're referring to the little wooden or plastic triangle thingies that come along with a pre-stretched artist's canvas, they are wedges that are meant to be hammered into the corners from the back to tighten up the canvas if it ever gets loose on the stretcher frame.Good luck!...âº. Source(s):hey are called stretcher keys. If your canvas loses tension you can put them in to make the surface more taught. A loose canvas can cause cracking or flaking in your paintings so its always best to keep the keys in case this happens.
Visual Thinking Topics. Analytical Think. Analytical thinking is a critical component of visual thinking that gives one the ability to solve problems quickly and effectively. It involves a methodical step-by-step approach to thinking that allows you to break down complex problems into single and manageable components.
Critical thinking is that mode of thinking â about any subject, content, or problem â in which the thinker improves the quality of his or her thinking by skillfully taking charge of the structures inherent in thinking and imposing intellectual standards upon them. (Paul and Elder, 2001).