Is it possible to add a symbol to a space tag that would only be visible in certain conditions?

For example, I am creating combined strategy drawings and would like to show coloured dots in each room to indicate whether or not they require door access, pa system, cctv etc.

It's too soon in the design process to actual show the individual items, and I can't use colour fill as some rooms will contain all of these.

I was going to do this as a space tag that picks up values assigned to the space using yes/no parameters, but the design engineer "doesn't like text on drawings". That was the only way I could think of to combine these on one drawing. Anyone got any better ideas?

Many Thanks