Forum navigation icons on the Thread reading page:

• : jumps to the 1st post (at the top)
  
• : jumps to the previous parent post
  
• : jumps to the previous answer
  
• : jumps to the next answer
  
• : jumps to the next parent
  
• : jumps to the last post (at the bottom)
  
• : jumps to the 1st answer to a post