'Reordering a heatmap for maximal contrast between subgroups

I've created a heatmap using aheatmap from NMF package:

aheatmap(x, scale="row", 
         color = "heat",
         annColors = "Set2", 
         annCol=annotation, 
         Colv = NA, 
         Rowv = "man", 
         main = "All patients")

So I get the following result:

However, the heatmap does not really show what I intended... I want to have "lots of yellow", when the therapy group is high and "lots of red" when the therapy group is low. Is there any way to reorder the rows/columns, so that I can make the best out of the data? Should I perhaps use another heatmap package?

r heatmap

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'Reordering a heatmap for maximal contrast between subgroups

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