But the line also has a more concise way than other broad characteristics of the object, (for this reason that in order to sketch lines based practice has become a large number of students practice art modeling capability of a quick honing basic skills), so a lot of painting schools and Style developed to an advanced stage, often enhanced the performance of line functions in order to achieve a high degree of broad artistic realm, such as old age, Picasso, Matisse are persistent in the organization with the line drawing images. Picasso was also highly praised the Chinese painting.

但是线条又具有比其他方式更能简练的概括对象的特点,(正因为此,以线条为主的速写练习就成为了众多美术学子练习快速磨炼造型能力的一种基本功)所以许多的绘画流派与风格发展到高级阶段,往往强化了线条的表现功能,以达到高度概括的艺术境界,例如晚年的毕加索、马蒂斯都执着的在用线描组织画面。