It's very simple, I simply look for the name that we attribute to a grobal variable in the table of families in excel. (Example for a D1@Esquisse1 rating)
How are the variables defined if it is possible to control them using the family table?
There you can get around the problem by rating over your variable and linking this dimension to your variable and this dimension you can retrieve it in an excel file...
I also know the trick but it happens that when changing configs the variable doesn't follow each time, you then have to reopen the equation tab and refresh each config it's very annoying