New issue 1207: size of annotate_axes can be very small in a VR https://bitbucket.org/yt_analysis/yt/issues/1207/size-of-annotate_axes-can-b... Michael Zingale: if you draw the axis triad on a domain with annonate_axes(), it sometimes comes out really small. See the image below (the triad is the few pixels in the upper right).