1.Itinterjectspreviouslystoreddata about the object into the activity of drawing.
2.It calls up early symbols created to stand for (not look like) the complex visual information it receives.
3. Itcreatesnewsymbolsandgeneral- izes information to make it easier to store.
4. It focuses on surface details for which it has a name and ignores information that explains the structure of forms.