Alignment Window Colour Menu
  
    - Apply Colour To All Groups
      If this is selected, any changes made to the background colour 
      will be applied to all currently defined groups.
       
      - Colour
  Text ...
      Opens the Colour Text dialog box to set a different text colour for light and dark background, and the intensity threshold for transition between them.
       
    - Colour Scheme options: None, ClustalX, Blosum62 Score, Percentage 
      Identity, Zappo, Taylor, Hydrophobicity, Helix Propensity, Strand Propensity, 
      Turn Propensity, Buried Index, Nucleotide, Purine/Pyrimidine, User Defined
       See colours for 
      a description of all colour schemes.
     
    - By Conservation
      See Colouring 
      by Conservation.
     
    - Modify Conservation Threshold
      Use this to display the conservation threshold slider window. 
      Useful if the window has been closed, or if the 'by conservation' option 
      appears to be doing nothing!
     
    - Above Identity Threshold
      See Above Percentage 
      Identity.
       
    - Modify Identity Threshold
      Use this to set the threshold value for colouring above Identity. 
      Useful if the window has been closed.
       
    - By Annotation
      Colours the alignment on a per-column value from a specified annotation. 
      See Annotation Colouring.
     
    - By RNA Helices
		Colours the helices of an RNA alignment loaded from a Stockholm file. See 
		RNA Helices
		Colouring.