Several labels in refPointLabel plotHeatmap Deeptools

Question

[glyptonotus]

Hi,

I would like to know how can I introduce two different labels in --refPointLabel when constructing a heatmap using different BED files from different regions.

I have 3 BigWig files (3 samples) and 2 BED files (one with TSS coords and the other one with TTS coords) and I have perfomed the following steps:

computeMatrix reference-point -S sample1.bw  sample2.bw  sample3.bw\
                              -R BED_TSS BED_TTS
                              -b 4000 -a 4000 \
                              --missingDataAsZero --maxThreshold 1000 --skipZeros --sortRegions keep 
                               -o output.mat.gz

plotHeatmap -m output.mat.gz --refPointLabel 'TSS TTS' --perGroup --sortUsingSamples 1 2 3 -out output.png

However, I cannot use --refPointLabel 'TSS TTS' since only one entrance is permitted. In the following picture, left heatmaps correspond to the TSS region and right ones to the TTS. How could I solve this to plot TSS one the the left maps and TTS on the right ones?

Thanks for any suggestion!