let's assume u hve created a txt file now u need open it
to add more text data in it if u wrongly open this file more than one texteditor window of course u know texteditor opened txt files minimized windows as bubbles on each other on homescreen via overlappingthen u may save one of them after typing text data now if u click on another minimized bubble from same txt file opened by text editor u will miss all the text data u had added some minutes ago if u click on its save button so please don't allow open a same txt file more than one texteditor window to modification