Change Windows Size.
Change Chrome's window size.
It is convenient to standardize the size when you attach screenshot to manual or blog.
Oct.30, 2019 Known issues
I've found that this doesn't work correctly if the Chrome window size is maximized.
This probably happened in Chrome78.
I checked the program but could not find a fix method.
If the Chrome window size is maximized, it will work correctly if you change it manually.