afni.nimh.nih.gov

I actually just solved my problem. If you don't mention a controller B in the layout, controller A will be outside the window whatever value you put.
Here is the layout that works for me:

***LAYOUT
  A geom=+73+1106
  A.axialimage geom=337x337+721+541 ifrac=0.8
  A.sagittalimage geom=523x217+1725+633 ifrac=0.8
  A.coronalimage geom=523x217+1116+605 ifrac=0.8
  B