How to add a custom description to specific values using Adobe Analytics

Hi,

I created a dashboard to look at site code performance that I would like to schedule for automated delivery. There are several site code values applicable to my particular client that I have filtered in (vs all other values used by other clients) and they are a combination of letters and numbers. I would like to add a custom description so that whoever sees what I plan to send can understand each site code placement in plain English (e.g. see 'Banner on Homepage' in addition to rstab7ea4).

Is that possible? if so, how? 

Thanks in advance