Is there a way to hide building lines?

[apg]

In the building menu pop up where you choose what to build, is there a way to hide certain building lines say for example the 'keeps' building line until a 'condition' has been achieved? Eg. could hide said building line until the year 1320 or until a stables has been built etc..

EDIT: by 'hide' i mean so it is not literally visible to the players eyes. Thus not available for selection.

 

[Wizzington]

I think if you just move the tech conditions from trigger = { } to potential = { } it will hide them as you want.

 

[apg]

so things can only remain hidden using the context of technology?

 

[Wizzington]

No, you can hide anything by just putting requirements in potential instead of trigger.