Overall width triggers appearance of nested family

[Anonymous]

Hi All, 

Please could i have some help trying to achieve the below? 

I would like a nested family to only display when the overall width parameter (Overall Width) in my top level family reaches a certain size. (1100mm)

Is this a Yes/No parameter? and what formula would i require?

Also if i apply this - does this method only hide the display (but still appear in schedules)?

Many thanks,

Callum 

[ToanDN · Accepted solution]

Enter the formula for the yes/no parameter: overall width > 1100

[Anonymous]

Hi what is this formula?

Thanks