Use Case:  
 
 
  
 
 
  Multiline additional field sizes cannot be modified directly in the UI.  These can be modified using Field and Form Rules.
 
 
  
 
 
  Execution Steps: 
 
 
  
 
 
  1.  Create a new 'Multi-Line' additional field and copy the "column name" of the additional field created from the additional field listview.
 
 
  2. Column name can be identified by going to Reports>New Query Report>Running the below query 
 
 
  
 
 
  select columnname from columnaliases where aliasname like '%test%'
 
 
  
 
 
  
  
 
  
 
 
  Replace test with the field name. 
 
 
  
 
 
  2.  Go to Admin > Incident Templates > Select a particular template > Include this additional field in the template > Field and Form Rules > Rule execution - On Create / Edit > Event - "On Form Load"  > Actions - Execute Script - Copy Paste the below code snippet and save the script.
 
 
  
 
 
  
   var x="UDF_CHAR2";
  
  
   var height=10;
  
  
   var width="width:150%!important";
  
  
   jQuery('[name="'+x+'"]').attr('rows',height).attr("style",width); 
  
  
 
  
 
 
  3.  Replace "UDF_CHAR2" with the copied "column name" of the additional field. 
 
 
  
 
 
  4.  The request additional field will size will be modified in the new request creation form.
 
 
  
 
 
  
 
 
  Field And Form Rule: