Dashing

Dashing[{r1,r2,…}] is a two-dimensional graphics directive specifying that lines that follow are to be drawn dashed, with successive segments of lengths r1, r2, … (repeated cyclically). The ri are given as a fraction of the total width of the graph. 

Dashing[r] is equivalent to Dashing[{r,r}].

Dashing[{r1,r2,…},offset] offsets the dashes by offset.

Dashing[{r1,r2,…},offset,capform] sets the CapForm for individual dashes to capform.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.