Minimal Example

library(ggflowchart)

Create a tibble (or data frame) with each row representing an edge.

data <- tibble::tibble(from = c("A", "A", "A", "B", "C", "F"),
                       to = c("B", "C", "D", "E", "F", "G"))

Create the flowchart using the ggflowchart() function.

ggflowchart(data)

Change the default styling.

ggflowchart(data,
            colour = "red",
            text_colour = "red",
            arrow_colour = "red",
            family = "serif",
            x_nudge = 0.25)