Introduction - If you have any usage issues, please Google them yourself
Basic graphic rendering function: straight, round, rectangle and polygon;
Data saving function, able to save graphics data to files;
Simple edit function: double-click to delete the selected graphic elements using the keyboard Del keys and menu items;
is able to load saved data from files and can perform basic editing operations;
The object can be enlarged and reduced.
If two program instances are run on a computer, the operation is in addition to any program
The same result can be seen in the program, which is the function of communication between programs.