Mellel 3.5.2 with macOS 10.12.2
When I switch to a Polish Pro keyboard:
and I am in Mellel, I cannot access the keyboard shortcuts for accents (i.e. to get an accented 'o' = Alt + o; accented 's' = Alt + s, and so on).
In every other application I use, switching to the Polish Pro allows me to get the accented characters mentioned in the previous paragraph (nvAlt, Pages, Nisus, Mail, BBEdit etc. It is just in Mellel that this does not happen.
Is there some setting for Mellel that is unique to the application which means that I cannot get Polish accented character?