You may, of course, mark a "fan" of lines for the variational possibilities, but if you operate mostly in a certain area then only one line need be drawn on the rule.
Unganako ukuphawula eyakho imigca ukwenzela utshintsho olunokwenzeka, kodwa ukuba usebenza kweyona ndawo uqinisekileyo ngayo umnye kuphela umgca okufuneka uzotyiwe kwirula.