The illustrations used in the paper are often very delicate, and a lot of information and labels are integrated into one picture, as shown below:

In the PDF file, we can find that the text annotation in the picture is vectorized, so zooming in and out will not affect the display effect.

So how is this illustration drawn?

The test found that this annotation was drawn in Visio and inserted into word. You can't select the corresponding text annotation in Word, but after converting to PDF format, the text annotation becomes an independent element, which can be selected by vectorization.

The basic method to realize this drawing is:

Points to note: