TR6 door adjustment

[jbonina@nectech.com]

     My drivers side (LHD) door doesn't stay shut tight after it latches. 
     It pops open about 1/4" even though it's still latched.
     
     Also, maybe related, I can feel a slight sag in the hinges if I pull 
     up on the exterior door handle.
     
     How do I adjust the door so that it stays shut tight and flush with 
     the front and rear body panels?
     
     
     Domo, domo
     
     Jeff
     '73 TR6 in MAss.