In content page editor, attach toolbar to window so content can scroll within it

In Page Editor, it is tedious to make edits in design mode on pages which require scrolling because the toolbar is stuck at the top of the page. So to make a change farther down the page, I have to select the text, then scroll to the top, click the button, then scroll back down to see the change. The toolbar should be fixed to the window and the page content should scroll within it. Also, why can't I change the size of the page editor window? It only takes up half my screen, I would prefer to be able to resize it or at least have it expand to 3/4 of the screen - less scrolling on longer pages.