Use the HatchToBack command to display all hatches, solid color fills, and gradient color fills behind all the other entities in the drawing.
To display all hatches behind other entities:
All hatches from the drawing, including fills and gradients, are moved under all other entities of the drawing. The display order of the hatches remains the same.
Hatch entities on locked, turned off, or frozen layers are also moved behind other entities.
Note: The HatchToBack command ignores hatches inside Blocks and external references.
Access
Command: HatchToBack
Menu: Tools > Display Order > Send Hatches to Back
Ribbon: View > Bring to Front > Send Hatches to Back