How do I set the
Round joinas the default line behaviour in Illustrator?
Now when I create a line the cap is set to
Miter joinby default.
With nothing selected, make the changes you want, save the file as a
.ait template — if desired, place the template where the default templates are — on a Mac using American English that’s:
~/Library/Application Support/Adobe/Adobe Illustrator CS#/en_US/
Adjust as necessary for how your system is configured.