cng

try changing annotation_name_gp= gpar(fontsize = 20), I think that also looking at section 3.14 on https://jokergoo.github.io/ComplexHeatmap-reference/book/heatmap-annotations.html might be helpful!

Approach by @moschmi worked for me.

@VicenteFR - I don't see your original code references the .h5ad dataset, can you share that?