Note: Alternatively, you can select a door, and click Door tabGeneral panelEdit Style drop-downDoor Styles.
Select the style you want to edit and click the Display Properties tab.
Select the display representation for which to remove door muntins, and click .
Click the Muntins tab.
Select the muntins block to remove.
Click Remove.
Repeat steps 6 and 7 to remove multiple muntins blocks.
Select Automatically Apply to Other Display Representations and Object Overrides to remove muntins block(s) from all display representations of the selected door style.
Clear this setting to remove muntins block(s) from only the selected display representation.
When you finish removing muntins blocks from the door style, click OK two times.