Differently sized window borders?

Dear all,

Just asking out of curiosity, why do some windows have thicker window borders than others?

In the following example, Nautilus files has a thicker window border than MATE Tweak.

Is this difference due to one being GTK3 and the other GTK2?



Some applications uses the GNOME3 inspired “header bars” which are larger.

1 Like

Thank you, @Wimpy!

But both can still be GTK3 applications, correct?