The advantage of drawing in visio is that it is very convenient to connect automatically. You can write by double-clicking the line. The disadvantage is that it is a bit troublesome to insert formulas when drawing flowcharts. If you want to insert a formula in the box, it is not impossible. Locate the insert bar above visio:

Locate the container in the Insert column, and then select any one:

Then click (Insert Formula into Container) in the inserted container.

Find an object in the Insert column.

Open it, find the WPS formula (Microsoft word2003 formula can also be used), enter the formula you want, and then close the window. You can see that there is a formula in the container:

Note that when the formula is repositioned in the container, it is still in the container. When you move the container, the formula moves with it. You can enter comments in the title bar. If you don't want it, choose delete.

Power Point drawing (taking version 20 16 as an example)

The questioner may not have thought about why it is convenient for PowerPoint to draw the system block diagram, and PowerPoint connections can be automatically connected, but the trouble is that each connection needs to insert a clip or line segment (this work can be done after all the boxes and formulas are drawn).

First, create a slide and how to change the layout to blank.

Then, in the Insert column, insert a shape. Usually, the system block diagram is rectangular or circular. Take a rectangle as an example:

Similarly, click on the inserted rectangle (much more convenient than visio), how to find the formula in the inserted column, and how to enter the formula (the formula will be automatically centered, which is also more convenient than visio).

When inserting another block diagram, copy it directly and how to change the formula of the column. Here, take an advanced error correction link as an example. Next, we need to connect two links, insert a shape in the column, and find the line segment:

When two rectangles are connected, the midpoint is automatically aligned, which is as convenient as visio:

There is a small disadvantage here, that is, you can only practice four threads at most at the comparison point, which may be a bit troublesome if you connect with wires.

Here, I suggest readers choose polyline connection:

Hope to adopt, thank you.