var instance = new Vintasoft.Imaging.UI.VisualTools.WebTextSelectionToolJS();

var value; // Type: number
value = instance.get_TextSelectionAutoScrollStep();

function get_TextSelectionAutoScrollStep() : number;

The step value, in pixels, which should be used for auto scrolling in image viewer when text selection is performing in image viewer and mouse cursor is moving outside the image viewer. 0 - image viewer will NOT be scrolled when text selection is performing in image viewer and mouse cursor is moving outside the image viewer;
N - image viewer will be scrolled by N pixels when text selection is performing in image viewer and mouse cursor is moving outside the image viewer.