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Hi,jpmaia
you are right, I used the method that make each legend item long enough with whitespace,and accomplished my goal. it is better method before find other method. if you will find other method in the future, please tell me!
thank you very much at all times.

the legend item show as follow: —— legend text1 max: maxvalue avg: avgvalue cur: curvalue —— legend text2 max: maxvalue avg: avgvalue cur: curvalue so, not to keep the legend short. my project is web project,it is urgent to make me temporarily to give up the effect of ordering the legend items in a ...

thank you very much! jpmaia
because the legend text is long, it is not suitable to the right side (or the LEFT side). It will look nice and clear if can leave the legend on the bottom AND align them vertically.

how to show one legend item per row in legend area?
for example:

—— legend text1
—— legend text2
—— llegend text3
—— llegend text4