The function is only for Windows, where it tries to register font family provided with "Windows bitmap device". On other platforms, fonts should be readily available after installation. Note that even on Windows, you can instruct RStudio to use smarter graphics device, such as "AGG" or "Cairo" (Tools > Global Options > General > Graphics > Backend).
Usage
register_reschola_fonts(family = c("Ubuntu", "Ubuntu Condensed"))
See also
Other Font helpers and shortcuts:
import_fonts()
,
install_reschola_fonts()
,
use_reschola_fonts()