UseFunctions are assigned to specific function trees which are selected by asset environment . These are always the trees which are directly assigned to this environment, or which belong to a sub-environment of the latter.
In view Function tree you can determine in which additional function trees the function can be found.
The mark in column One indicates that the function is assigned to a function tree. The subsequent columns indicate which function tree that is and to which environment it belongs.
A field with gray background and marks documents the function trees containing functions.
In order to assign functions to further trees, mark the white field. Provided here are the individual trees, belonging to the environments, and containing the sub-environment of the function.
For more information, seeFunction Trees.