Based on the provided information, the film 'Portrait of an Actor' does not feature identifiable LGBTQ+ characters or themes. Consequently, no specific portrayal or net impact regarding LGBTQ+ representation can be assessed.

This documentary, 'Portrait of an Actor,' chronicles the life and career of Richard Burton. The narrative is entirely focused on the cisgender actor's professional and personal journey, with no depiction of transsexual characters or exploration of related themes. Consequently, the film has no impact on the portrayal of transsexual identity.

The movie does not contain any action or adventure elements.

The film's title suggests a documentary or a film centered on an actor, not an adaptation of existing source material with pre-established characters. Without information about canonical characters or source material, there is no basis to identify a gender swap.

The film's title, "{Portrait of an Actor} ({movie}, {1971})", suggests it is a documentary or an original work, not an adaptation of a source with pre-established characters whose race could be altered. There is no information to indicate any character was canonically or historically established as one race and then portrayed as another.