"Edit Active Part Only" Solo Editor Function Problem_Cubase7

i seem to remember being able to open more than 1 track at a time and seeing tow or more windows to work in with the project minmized…i used this to say line up the base in one track with the base drum in the another track…now i know about the edit in place function but want to know if the other fucntion still works…now ive been trying to do this the old way 4 to days i could swear that i did it ,that is had 2 tracks open and project window min but dont know how i did it …sooooo HELP…lol