I have problem in creating further columns when it is table having some merged cells for eaxample I have a table First column SNo and 2nd column Month. Now Month is divided into further sub-columns like Jan,Feb. Now each month is further divided into sub-columns like 1st Week, 2nd week, 3rd week, 4th week. Now If I want to create further more columns using options Table-Insert-Insert column to right. It disturbs my table and previousl made columns get shifted. so please tell me how to create further columns.