When you click inside a source or target segment in the Editor window in the Editor view, you can then use either the UP and DOWN arrows or the mouse-wheel to scroll the document segments.
By default, the source and target segments are displayed as a single list with a single scroll bar. If you prefer, you can display them as two separate lists, each with its own scroll bar. In this mode you can scroll the target segments without scrolling the source segments and vice versa.
When you display source and target segments as separate lists, each list has its own scroll bar.
To toggle between scrolling segments as a single list or as two lists, select the Auto-scroll Source Document option on the View menu.
When you scroll source and target segments as two separate lists, they become misaligned. To realign the source and target segments, select View > Scroll source to target selection from the menu bar.