@a773 they look kinda ugly tbh. For linux you need to compile yourself, because of the variety of distros. (clone the pdnext repo, then follow the normal steps to make & install pd, hopefully just with "./configure" and then "make install" in the directory on the command line.)
After all of that, you can either use the menu item in the preferences submenu to turn the bezier curves on, or put the line set ::curve_cords 1
in some .tcl file in the pd path before starting pd if you want it saved.
to make the cords change when the menu item is selected (rather than when the window is opened) put the code with the "redraw_cords" proc above in some .tcl file in the pd path.