Switches between different selection modes.Click this field to open a popup menu with the following options:
ModeEffectStandard selectionThis is the default selection mode for text documents. With the keyboard, selections can be performed by Shift+navigation key (arrows, Home, End, Page Up, Page Down). With the mouse, click in the text where the selection is to start, hold the left mouse button and move to the end of the selection. Release the mouse key to end selection.Extending selectionUse the mouse, arrow keys or the Home and End keys to extend or crop the current selection. Clicking anywhere in the text selects the region between the current cursor position and the click position.Hold the Shift key to temporarily activate the Extending selection mode.Adding selection (Shift+F8)Use this mode to select multiple ranges of text. Each new selection using the mouse or keyboard is added as a new selection.Hold the Ctrl key to temporarily activate the Adding selection mode.Block selection (CommandCtrl+Shift+F8)Use this mode to select a non-contiguous block of text.Hold the Alt key to temporarily activate the Block selection mode.