Sometimes, we need to draw some shapes in PDF according to document contents. Actually, there are too many shapes we can draw and the most frequently used shapes are geometric figures. In the last post, I have introduced a method about how to draw circle...

Sometimes, in order to introduce contents in a PDF document more clearly, people may add some shapes. For example, if one document focuses on introducing geometry, many shapes must be inserted, such as rectangle, triangle and so on. Also, people can adjust...