Numbering symbol connection points
You can assign numbers to symbol connection points. These numbers appear in the drawing and are used in the list of wires.
Right-click a symbol in the drawing and select Connection points. Enter the connection point numbers in the dialog window that opens.
After you confirm the dialog with OK, you can drag the connection point numbers to adjust their positions in the drawing.
Saving positions of connection points to the library
Use the context menu item Save positions of labels to save the positions of connection point numbers and attributes to the symbol library.
Any symbols you insert afterward will use these saved positions.
Color of connection point numbers
You can change the color of connection point numbers in F12 - Document - Fonts.