Basic problem: customing the legend bar text

Hello all,
I am new to use GH, so I got another basic problem. I got overlayed texts beside the colour legend like the capture pic. I try to solve it with legend parameter component,like change the fonts size and other options. I sitll can not change it. Anyone could help?
Many thanks.

Probably you have multiple charts based on your results which overlapped at the same coordinate point.
You need to set some different basePoint_ according to your results.
like this:

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Thank you so much for all your help.