add_sub                 Add annotation underneath a plot
align_margin            Align multiple plots along a specified margin
align_plots             Align multiple plots vertically and/or
                        horizontally
axis_canvas             Generates a canvas onto which one can draw
                        axis-like objects.
background_grid         Add/modify/remove the background grid in a
                        ggplot2 plot
cowplot                 cowplot.
draw_figure_label       Add a label to a figure
draw_grob               Draw a grob.
draw_image              Draw an image
draw_label              Draw a text label or mathematical expression.
draw_line               Draw a line from connected points
draw_plot               Draw a (sub)plot.
draw_plot_label         Add a label to a plot
draw_text               Draw multiple text-strings in one go.
get_legend              Retrieve the legend of a plot
get_panel               Retrieve the panel of a plot
ggdraw                  Set up a drawing layer on top of a ggplot
ggsave                  Cowplot reimplementation of ggsave.
gtable_remove_grobs     Remove named elements from gtable
gtable_squash_cols      Set the width of given colums to 0.
gtable_squash_rows      Set the height of given rows to 0.
insert_xaxis_grob       Insert an axis-like grob on either side of a
                        plot panel in a ggplot2 plot.
panel_border            Add/remove the panel border in a ggplot2 plot
plot_grid               Arrange multiple plots into a grid
plot_to_gtable          Convert plot or other graphics object into a
                        gtable
save_plot               Alternative to ggsave, with better support for
                        multi-figure plots.
theme_cowplot           Create the default cowplot theme
theme_map               Create a theme for map plotting
theme_nothing           Create a completely empty theme
