in apex 4.2.3 i can add class to my button using
Button style : HTML button
Button CSS Classes : myclass
in apex 5
Button style is changed by Button template (HTML button (legacy - APEX5 migration)
==> Where can i put my button css class ?
CSS Classes is hidden by default to display it we have to do one of the two things
2- click on "Go to group" then "Appearance"