unanchor

un- +‎ anchor

unanchor (third-person singular simple present unanchors, present participle unanchoring, simple past and past participle unanchored)

1. (transitive) To raise an anchor or to free a vessel from an anchor.
2. (transitive, by extension) To liberate.
3. (intransitive) To become loose or physically unattached.
4. (transitive, graphical user interface) To release from a fixed position and allow to be moved.
   • 2012, Greg Harvey, Excel 2010 For Dummies:

     To unanchor the cell cursor so that you can move it into position for selecting another range, press Shift+F8. This puts you in Add to Selection mode, in which you can move to the first cell of the next range without selecting any more cells.