Seurat: How can I change the size of gene names displayed on DoHeatmap?

[SFF-singecell-user]

Hi, I am using v3 and would like to shrink the gene name labels on a heatmap. (In v2 I used cex.row = , but that does not work with v3)
Thanks in advance for any tips!

[timoast]

Hi, you can change the text size using the theme function in ggplot2:

DoHeatmap(object = pbmc_small, features = VariableFeatures(pbmc_small)) + 
    theme(text = element_text(size = 20))

[SFF-singecell-user]

Hi Tim, Thanks so much for your suggestion. Unfortunately, that only seems to change the size of the Legend text, not of the gene names.

[timoast]

I can't reproduce that, here's the output of my example without changing element_text:

And setting element_text(size = 20):

[SFF-singecell-user]

Hi Tim,
This is what happens when I try that- it only changes legend size.
I really appreciate your help, and any further suggestions

DoHeatmap(object = immune.small, features = top20$gene, assay = "integrated") + theme(text = element_text(size = 4))

size4.pdf

[SFF-singecell-user]

Good news- Was able to fix it, had to use theme(axis.text.y = ...)
thanks again for your help!

DoHeatmap(object = immune.small, features = top20$gene, assay = "integrated") + theme(axis.text.y = element_text(size = 5))