Hi, 
  
  
  
The documentation indicates that  
  
"Trend lines are horizontal/vertical lines spanning the chart canvas which aid in interpretation of data" 
  
  
  
How do I specify a trend line to be vertical?   
  
  
  
I basically need to label a vline. 
  
  
  
Apologies if this is not the appropriate forum. 
  
  
  
TIA..