If this feature is enabled UltraEdit will scroll all windows that are not minimized when any of the windows are scrolled vertically. This allows viewing two (or more) files together without the need to scroll each one individually.
When the user clicks on the vertical scroll bar to provide scrolling, or on the up/down arrows on the vertical scroll bar the windows will be scrolled together.
Additionally if the user uses the Ctrl+Up/Down for scrolling the windows will be scrolled together.
If the user uses the cursor keys to reposition the file the windows will not be scrolled together allowing the user to change position in one file without affecting another file.
Scrolling by dragging the "Thumb" on the vertical scroll bar will attempt to scroll the windows together, however this method on large files may not keep the files synchronized.