Changing the legend title changes the continuous scale to categorical. · Issue #3187 · tidyverse/ggplot2 · GitHub
![ggplot2: Is it possible to combine color/fill and size legends? - tidyverse - Posit Forum (formerly RStudio Community) ggplot2: Is it possible to combine color/fill and size legends? - tidyverse - Posit Forum (formerly RStudio Community)](https://community.rstudio.com/uploads/default/original/2X/e/ef9b8185ec4cf84a15d92ad6909cd8cc06de9ad5.png)
ggplot2: Is it possible to combine color/fill and size legends? - tidyverse - Posit Forum (formerly RStudio Community)
![ggplot2 legend : Easy steps to change the position and the appearance of a graph legend in R software - Easy Guides - Wiki - STHDA ggplot2 legend : Easy steps to change the position and the appearance of a graph legend in R software - Easy Guides - Wiki - STHDA](http://www.sthda.com/sthda/RDoc/figure/ggplot2/ggplot2-legend-guide-color-bar.png)
ggplot2 legend : Easy steps to change the position and the appearance of a graph legend in R software - Easy Guides - Wiki - STHDA
![Ggplot2: Change legend title while controlling line types and colors - tidyverse - Posit Forum (formerly RStudio Community) Ggplot2: Change legend title while controlling line types and colors - tidyverse - Posit Forum (formerly RStudio Community)](https://community.rstudio.com/uploads/default/original/2X/6/645d5c639684d551e62963a3f4bbe1ba8abf4340.png)
Ggplot2: Change legend title while controlling line types and colors - tidyverse - Posit Forum (formerly RStudio Community)
![ggplot2 legend : Easy steps to change the position and the appearance of a graph legend in R software - Easy Guides - Wiki - STHDA ggplot2 legend : Easy steps to change the position and the appearance of a graph legend in R software - Easy Guides - Wiki - STHDA](http://www.sthda.com/sthda/RDoc/figure/ggplot2/ggplot2-legend-guide-scale2.png)