Custom position set up in studies

great ones! has the format been changed in setting up a custom position for studies for when using firefox i can paint the entire board with pawns, rooks or anything else with a single selection and it makes it rather tedious having to try to set up a position, infact, its impossible. Perhaps i am not used to it or there is a script running that my browsers handles in a different way, difficult to tell. I wonder if this is a new feature that I am unaware of - regards Robbie