Class PositionDisplay

src/plot_widget.rs:1907–1910

        if let Some(renderer) = renderer_state.renderers.get(&self.instance_id) {
            renderer.draw_in_pass(render_pass);
        }
        true
    }

    /// MSAA path (desktop): dedicated offscreen MSAA pass + resolve +
    /// composite. Android (MSAA=1) never reaches this — `draw` handles it
    /// in-pass.