To Turn Off the Display of Muntins in a Window Style
Use this procedure to turn off the display of muntins in a window style. You can turn off the display of window muntins without removing them from the window.
Expand Architectural Objects, and expand Window Styles.
Select the style you want to edit.
Click the Display Properties tab.
Select the display representation where you want to turn off the display of window muntins, and click .
Click the Muntins tab.
Select Disable Muntins Blocks.
Select Automatically Apply to Other Display Representations and Object Overrides to apply the changes to all display representations of the selected window style.
Clear this setting to apply the changes to only the selected display representation.