lc and lw
lc sets the line colour and lw sets its width. Explicit RGB colours make styles easier to reproduce.
Gnuplot · Lines · Points
Choose a line and point style visually, then copy a ready-to-use Gnuplot command.
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lc and lwlc sets the line colour and lw sets its width. Explicit RGB colours make styles easier to reproduce.
dt and ltdt selects the dash pattern. lt selects a terminal-defined line type, which may also imply a default colour.
pt, ps, and pipt selects the point symbol and ps its size. With linespoints, pi sets the interval between displayed symbols.
lsls applies a numbered style created with set style line, keeping long plot commands readable.
Preview basis: point symbols pt 0–15 follow the Cairo sequence used by pdfcairo, pngcairo, and epscairo. Other terminals usually show the common point types similarly, but exact symbols and dash patterns can vary. Run test after selecting a terminal when exact matching is important.
See the official Gnuplot documentation for set style line, dashtype, and pointtype symbols.