creo4 Drawing Setup option documentation for: DEFAULT_SHOW_3D_SECTION_XHATCH 
default_show_3d_section_xhatch
Controls the display of crosshatches for 3D cross-sections.
Default and Available Settings:
yes* - Crosshatches are displayed for selected 3D cross-sections.
no - Crosshatches are not displayed for selected 3D cross-sections.