In the single page view, you can change between the Light and Dark appearance by clicking "More", then "Appearance" in the top right corner.

                      Adobe XD Plugin
                  
                  
                    
                    Adobe PS Plugin
                  
                  
                      
                      Sketch Plugin
                  
                  
                      
                      Figma Plugin
                  
                  
                      
                      Axure Plugin  
                  
                  
              
                      Mockplus for iOS/Android
                  
              
Mockplus Cloud
                        
                        
                    
                    
                In the single page view, you can change between the Light and Dark appearance by clicking "More", then "Appearance" in the top right corner.
