Mullions

[jfjacques]

If I change the size of a mullion from say, 2" to 5" in length(perpendicular to the direction of glass,) how do I control what appears on the exterior and the interior of the glass? As it stands if I make a larger mullion, it seems to chose what portion of said length appears on the outside of the mullion and what portion appears on the inside of this mullion. 

[cbcarch]

-Glazing can be "exterior, center or interior glazed". The Mullion Profile family will determine this with reference planes and dimensions/parameters such as Profile, Position, etc.

-See this:

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2016/EN...

[barthbradley]

Are you taking about inset/offset? Give a positive or negative value to "Offset" Parameter under the Mullion's Type Properties. 

...also the "Width on Side 2" and "Width on Side 1" Parameters do relatively the same thing.

[ToanDN]

You can also control the location of the panel type in relation with the center plane of the curtain wall.