Noted Dimension

Hello

I've been working on structural drawings and its usual to note some dimensions for e.g. spans indications.

as noted in the image bellow, I have to write a text, different to the LDIM element, to note the dimension. I've tried to edit the DMTXT value, but it's forbidden by the system.  or you use #DEF or custom text, but not a mix of it.

is there a way to make a note in the dimension without lose the intelligence of the element?

thanks in advance

kind regards