To move a word, drag it to a new location. (Position the pointer over the word, depress the left mouse button and then move the mouse while holding the mouse button down.) As you drag the word, a rectangle indicates where the word will be placed when you release the mouse button. When you release the mouse, the word is repositioned and all arrows entering the word are redrawn.
You may also move one or more words by selecting them with the Move/Size tool active and then using the arrow keys. Words will be move one pixel at a time or by the amount you have set for Snap-to in Sketch tab of the Global Options Dialog.