Follow Active Quads (How to I make the face active?)

Ladytron

I'm trying to map a curved plane, by using the "Follow Active Quads"  but ut doesn't work. I get "No active face" .

I tried following these tutorials but, it still didn't work. 

https://wiki.blender.org/index.php/Extensions:2.4/Py/Scripts/UV/UV_Calculate/Follow_active_quads
http://blender.stackexchange.com/questions/28085/follow-active-quads-not-working

It says:

 Pick the quad that you want the other faces to follow and map it in the UV/Image window.
Select connected faces to map from the active, their existing mapping will be overwritten.

And the other one says the same thing basically.

I've selected a face in "3D View" and in "UV/Image Editor". I did noticed that the "active face" is grey in this tutorial:



So how do I make the face active like that? 

Ladytron

I think I've figured it out. 

You have to be in Edit Mode > Face Mode to make a face active. Also the faces can't be triangulated, if they are you have to select the faces and press Alt J.

RN

Whenever I want to make an element the active one (like when using the active element pivot mode), I deselect it and select it again. I think it's always the last one selected.

Ladytron

Oh good tip! Thank you @RN!