Data extraction from a histogram plot

In Live Editor - can I extract data from a histogram plot and assign it to a variable ?

So, I have a number of single, disperse Gaussian distributions in my data and I want to "select" each one in turn to then fit and plot a Gaussian.

Ideally, on the plot in Live Editor, I'd like to either manually select a lower/upper boundary - and that now is my data selection.... or even better, a "click-hold" with mouse to highlight the data I want to extract.

Many thanks

Colin

(PS. Data brushing in main window works great - but not in Live Editor)