Use these holes to tie the button to the shirt (you can also use the ones of the eyes if you find necessary)
Use these holes (below the eyes) to increase the stiffness of the button for the connection
GUIDE FOR CHANGE COLOR:
Download the G-code (you can find the files with no ironing and with ironing on surfaces)
Prepare the red spool and begin printing with that color.
The printer will start up and after a few minutes it will advise you that you must insert the yellow color (automatically the printer will eject the red color and guide you in inserting the yellow one).
After some time the printer again advice you to insert red color.
So you have to do nothing. Just insert the GCode in your SD card and follow the instruction that the printer will show in the display ;)
GUIDE FOR PRINTING:
I advice to use 0.1mm of definition, if you want to increase it pay attention that all the walls will be printed!