You can drag either end of the vector, or you can relocate the vector by dragging it in the middle. You can also drag the label on the vector.

[i]This applet was developed for use with [url=https://www.pearson.com/en-us/subject-catalog/p/interactive-calculus-early-transcendentals-single-variable/P200000009666]Interactive Calculus[/url], published by Pearson.[/i]