Add stock to multiple portfolios

I like to have stocks listed in multiple portfolios.  I have my main one, which is stocks that I track day to day.  Then I put stocks in categories, for when I think an industry will have a change, and want to view those.  Therefore, I often repeat them.  But it is impossible to add a stock to multiple portfolios from the stock page, and it is only possible from the portfolio page, which is less efficient.