Drag-select
Alternatively referred to as click-and-drag, drag-select is a term used to describe the process of clicking on a portion of the screen and while continuing to hold the mouse button dragging the mouse to another portion of the screen and selecting anything in-between the drag. For example, clicking here and dragging horizontally to here would select the text here and dragging to here. When drag-selecting text vertically each row of text will be highlighted.
Also see: Drag, Click, Mouse definitions, Select