General HOWTO:

• Modify-menu HOWTO
   
• Measuring distances, angles, and dihedrals HOWTO
   
• K-point selection HOWTO
   
• Printing HOWTO
   
• Animations HOWTO (MPEG and animated-GIF movies)
   
• Customizing XCrySDen HOWTO
   

Scalar and vector fields HOWTO:

• DataGrid: Charge density (or Scalar Field) HOWTO
   
  • Isosurface HOWTO
     
  • Contour HOWTO
     
• Vector field HOWTO
   

Advanced HOWTO:

• XCrySDen's scripting HOWTO