get a ggplot legend object
getLegend(a.gplot)ggplot object
a legend grob
Other plot help:
AD2BP_trans(),
BP2AD_trans(),
axisLabel(),
bin2d(),
geoChronRPlotTheme(),
getPlotRanges(),
kde2d(),
meltDistributionTable(),
modeSelektor(),
periodAnnotate(),
quantile2d(),
reverselog10_trans()