Sash option on the horizontal Multi-sash window 25

[Matador264]

Hello,

On the sash option of the horizontal multi-sash window 25 I notice the "divided sash" is not proposed. Therefore, when I need to set a horizontal mullion at a specific height, I have to choose the editable grid. It is not very convenient because I have to drag each element to the correct height, and each time I modify the window, the elements come back to their default position.

Is it possible to make the divided sash option available? 

Thanks for your help.

Operating system used: Windows