Bond Plotting The bond plotting instructions are grouped into two general types, explicit and implicit, depending on how the bonds are specified.
Explicit bonds require a vector designator code for each bond.
There are two types of bonds that can be drawn, line bonds and stick bonds. The line bond is a very crude, but rapid, method useful in drawing preliminary illustrations. It is constructed by drawing a single straight line between two atom sites. Optionally, the symbol can be drawn on the atom sites. Line bonds are always specified implicitly.