Two-segment Axis?

[junli1988]

Hi, I have RNAseq data from a knockout vs. wt mice study. The problem is, when I try to render a volcano plot with the genes, the plot is skewed immensely by the gene that was knocked out. See below for the effect of the volcano I made. Is there a way for me to segment the X- and Y-axis? Ideally, both the knocked out gene and other genes should be prominent in the final graph. Otherwise, I could just discount that gene and plot the rest of the genes for volcano. Thanks in advance.