I’ve got a categorical model for 4 response classes, with varying intercepts for the 3 logistic sub-regressions. I’d like to plot the posteriors of the three group-level SDs, either as an `mcmc_areas()`

or as `mcmc_hist()`

, **with the exponential(2) prior curve on top of each posterior for reference**. Is this possible? The only thing I’ve been able to manage is drawing one single exponential(2) curve on top of the entire plot (see screenshot) rather than one scaled exponential curve for each posterior:

I imagine there should be a simple and easy solution, but I haven’t been able to find it yet.

Suggestions?