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As mentioned in this answer the ps setting can be used to change the point size of a plot: 

plot "./points.dat" using 1:2 pt 7 ps 10     # small point size
plot "./points.dat" using 1:2 pt 7 ps 100    # large point size

However ps seems to be ignored when using a character point type:

plot "./points.dat" using 1:2 pt "X" ps 10     # small point size
plot "./points.dat" using 1:2 pt "X" ps 100    # small point size

How to change the point size for character point types like "X"?

builder-7000
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1 Answers1

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Try this:

plot '+' u 1:1 w p pt "X" font ",10"
plot '+' u 1:1 w p pt "X" font ",100"
theozh
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