Dynamic Block Visibility question

Is there a way to have one of the items in your visibility selection be an attribute that only brings up the attribute editor box when you select it? Right now I have a block with several different angle iron sizes that can be selected and I want one of them to be "Special" so a size that isn't in the list can be typed in if needed.

With ATTDIA set to 1 the editor box pops up every time it's inserted but nothing can be edited. Can I get that to go away yet still keep ATTDIA set to 1?

I've attached the drawing.

HardRolledStiffener.dwg

certainly with 2008 ATTRIBUTEs and visibility states do not sit happily together.It is better to have the attributes visible at all times.

I am not sure about your second question but does setting ATTREQ to 0 give you what you want?

It does for that block. But I need it set to 1 for other blocks so the box pops up upon inserting the block.

I think what I'm going to end up having to do is make the SPECIAL visibility state not show anything and then insert another block attribute with the insertion point at the end of that leader line that can then have the angle size typed into it. That will work pretty well although it's not what I'd really like. This isn't something that will get used a lot but it would be nice to have.

On an unrelated note.... you wouldn't happen to know how to turn the Autostack for fractions back on would you?

Select the text in Mtext Editor and right click Stack, then right click again and look at Stack Properties