A leader line is capped with a $q,$ when the leader points inside the object.

a$.\mathrm{.}05in.(1\mathrm{.}5mm)$ circle

b$.\mathrm{.}25$ in$.(6mm)$ dott

c$.\mathrm{.}05in.(1\mathrm{.}5mm)$ dot

d$.\mathrm{.}05$ in$.(1\mathrm{.}5mm)$ arrowhead