Can't delete grid line from Curtain Wall download

[cbt990]

Hello,

I am trying to delete a horizontal gridline:

The unpinned one selected needs to be removed. I can't remove gridline segments or delete the entire gridline.

[ToanDN · Accepted solution]

You can't delete a curtain grid if it is defined by the curtain wall layout.  You can only move it, which can help in most cases. 

If moving still doesn't help, you need to change the curtain wall to a different type with more flexible layout (the most flexible is set the layout to None and manually place grids).