To Hatch the Area Between Multi-Line Components

Select the Hatch Area tool ( Drawing > Annotate > Patterns ).
Click the Element icon in the tool settings.
Select one component that is to be a boundary of the hatched area.
Select the other component that is to be a boundary of the hatched area.
The area between the selected components of the multi-line is hatched.

Hatching the area between multi-line components