求助：色标内侧横线位置不对以及输出图像如何调整大小呀！

WOT

如图所示，右侧色标内标注大小的横线位置不对，如何把0对应的横线调整到最底部，350 对应的横线调整到最顶部？
还有就是色标太靠近右侧了，怎么调整图像大小呢，我想让整体居中一点，帮帮孩子吧大佬们！！！


'reinit'
'sdfopen E:\GrADS\testwww\uwnd.mon.mean.nc'
'sdfopen E:\GrADS\testwww\vwnd.mon.mean.nc'
'sdfopen E:\GrADS\testwww\shum.mon.mean.nc'
'sdfopen E:\GrADS\testwww\pres.mon.mean.nc'

'set parea 1.5 10.0 1.5 8.0'
'set map 1 1 3'
'set mpdset cnworld cnriver'

'set xlopts 1 3 0.2'
'set ylopts 1 3 0.2'
'set xlint 10'
'set ylint 10'

'set t 413 869'
'set z 1 8 '
'define qu5=uwnd*shum.3/1000'
'define qv5=vwnd.2*shum.3/1000'
'set t 413'
'set z 1 8 '
'define qud5=ave(qu5,t+0,t=869,12)'
'define qvd5=ave(qv5,t+0,t=869,12)'
'define qdiv5=hdivg(qud5,qvd5)'

'set t 414 870'
'set z 1 8 '
'define qu6=uwnd*shum.3/1000'
'define qv6=vwnd.2*shum.3/1000'
'set t 414'
'set z 1 8 '
'define qud6=ave(qu6,t+0,t=870,12)'
'define qvd6=ave(qv6,t+0,t=870,12)'
'define qdiv6=hdivg(qud6,qvd6)'

'set t 415 871'
'set z 1 8 '
'define qu7=uwnd*shum.3/1000'
'define qv7=vwnd.2*shum.3/1000'
'set t 415'
'set z 1 8 '
'define qud7=ave(qu7,t+0,t=871,12)'
'define qvd7=ave(qv7,t+0,t=871,12)'
'define qdiv7=hdivg(qud7,qvd7)'

'set t 416 872'
'set z 1 8 '
'define qu8=uwnd*shum.3/1000'
'define qv8=vwnd.2*shum.3/1000'
'set t 416'
'set z 1 8 '
'define qud8=ave(qu8,t+0,t=872,12)'
'define qvd8=ave(qv8,t+0,t=872,12)'
'define qdiv8=hdivg(qud8,qvd8)'

'set z 1 8 '
'define qud=(qud5+qud6+qud7+qud8)/4'
'define qvd=(qvd5+qvd6+qvd7+qvd8)/4'
'define qdiv=(qdiv5+qdiv6+qdiv7+qdiv8)/4'

'set z 1'
'define qus=vint(pres.4(z=1),qud,300)'
'define qvs=vint(pres.4(z=1),qvd,300)'

'define shuiqi=mag(qus,qvs)'

*'define sandu=hdivg(qus,qvs)'


'set lon 40 120'
'set lat 20 60'

'set gxout shaded'
'E:\GrADS\test\text7.gs'
'd shuiqi'
'E:\GrADS\test\cbar_matlab 10 1 1'

*'drawvect skip(qus,2,2) skip(qvs,2,2)  tl 0.3 10 3 12 1 0.1 1 m/s'

'set gxout barb'
'set ccolor 1'
'set gxout vector'
'set arrscl 0.3 100'
'set arrowhead 0.06'

'd qus;qvs'
*'cbarn 1.2 0'

'draw title 1000-300hpa vapor flux and divergence'

'printim E:\GrADS\test\55.png  white x2500 y2000'
'disable print'