Hierarchy column display image(Triangle) format need to be changed in obiee11g

Hi ALL,
Hierarchy column display image(Triangle) format need to changed
For Mobile users of obiee11g, the triangle symbol image is big in size while viewing in mobile phone,i have two issues
1. I need to reduce the size of triangle image
2.Need to reduce the spacing between triangle image and the text
Expecting the the response ASAP
Thanks,
Bala

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Hierarchy column display image(Triangle) format need to be changed in obiee11g

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