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gap between fill and border in legend key · Issue #2844 · tidyverse/ggplot2 · GitHub
How To Easily Customize GGPlot Legend for Great Graphics - Datanovia
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ggplot2 legend : Easy steps to change the position and the appearance of a graph legend in R software - Easy Guides - Wiki - STHDA
/figure/unnamed-chunk-4-1.png "Legends (ggplot2)")
Legends (ggplot2)
