Dear Ratm22,
This is easy (when you know)!
if you use the tool modify legend, you can open this engineering list and see which attribut(variable) is used for the Mark position.
I have all version, but i just try on 2015, and it keep the last variable for the engineering module.
For your information, it also possible to call any attribut with an internal index. For example this attribut is @767@.
If you type this text @767@ in a custum attribut you will the standard text translated on your language.
By the way we know now which attribut.
If we need want to use it in your case, i will make two condition.
First will be to say, we want to use only bars: this is the standard filter on the select.
Second will be: Keep all bars Under 16: so we can write something like @767@<16. It means bars between 1-15.
Now an important point, you must use a correct link between this 2 condition.
For example, i will use the command 'Or' which is also |.
So if i now do it on the legend, i will see (see capture screen below).
It's also possible to save your filter and modify it manualy with a notpad.
Enjoy & Good Use!
Mr Judy GURAVADU
Responsable Technique Préfabrication & Ingénierie
Precast Sales & Support
Allplan France & Allplan Software Engineering
Depuis 2006