Basic question on how to draw a vertical line that splits the distribution in a histogram

Hi all
I am stuck in a basic procedure with histograms and hope someone can help.

I used the following code to prepare a histogram for scaled profit that is higher than -0.3 and lower than 0.3:

Code:

hist profit if profit>-0.3 & profit<0.3, width(0.0025) freq

How can I draw a vertical line that comes from zero and hence split the distribution in the histogram ?

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