As far as I am aware it is either on or off. I have sometimes had to show transparency in glass on some objects but not others (for instance if I have a glass balustrade and I want to see the windows or details behind it in the elevation). You can get around this by turning on transparency in elevations but using a non-transparent material for the glass you don't want transparent. Another way I have done this is to put the balustrade on a different layer and switch that layer to wireframe display in the layer settings then update my elevation layer group so then my elevation transparency is off but I can still see through the balustrade. Not sure if this helps you but its about all the control you get with transparency in elevations.
V12-V27, PC: Ryzen 9 3950X, 64g RAM, RTX5000, Win 11