You can select a sentence by holding down the Ctrl key and giving the sentence a click.With the Easy Hand mode of Atlantis you can scroll the document window with the mouse.
When this mode is on, you can grab any point of the document with the mouse, and drag the mouse pointer in the required direction to scroll the document window.
To toggle the Easy Hand mode, click the Easy Hand 
toolbar button, or choose the View | Easy Hand menu command.
