Heatmap text layout

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Hi everyone, I have the following heatmap:

[External image unavailable in archive]

There are some numbers that exit the rect glyph (big ones). I’d like to know if there is a way to let the text starts not in the middle of the rect (like a 0,0 coordinate), but to a personalized part, more to the left side. In this case I’ll not increase the width of the rects to avoid such a situation.

Hope to be clear, thank you!