[gradsusr] reduce space between plot

[Ismaila Diallo]

Dear,
I've plotted 12 map in 1 page (see file .jpg attached). i want to reduce the space between deferent plots (up, middle and bottom) so is'i possible?? if yes please could someone helps to do it. So i've tried by changing my set vpages but until up i get the same result.
Thanks in advance
DIALLO 

LPAOSF  
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