as.data.frame.OptPathDF has an okay help page, but to reach that help page, the user needs to know the function name (in particular, needs to know that OptPath objects have class "OptPathDF"). Also, the description of as.data.frame in the help file of "OptPath" is incomplete: It doesn't list all possible parameters of as.data.frame. Therefore:

1. Make a prominent link in ?OptPath that points to as.data.frame.OptPathDF
2. Make the description of as.data.frame in the OptPath help page complete