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ggplot2: Is it possible to combine color/fill and size legends? - tidyverse - Posit Forum (formerly RStudio Community)
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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) Ggplot2: Change legend title while controlling line types and colors - tidyverse - Posit Forum (formerly RStudio Community)](https://community-cdn.rstudio.com/uploads/default/original/2X/6/6329ef8e3d8853bbaaeea2cd0db90065501e95fb.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-guides.png)