If you are going to make your own copy of CollapsableFrame, would modifying this code in sub Populate also work? 
    $self->ConfigSpecs(
      ...
      -labelfont   => [$self->{ident}, qw/font Font SomeFont/],
    );

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In reply to Re^2: change title font in collapsable frame by pc88mxer
in thread change title font in collapsable frame by lil_v

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