The command adds a guide to the image.
| ![[Tip]](images/tip.png)  | Tip | 
|---|---|
| You can add guides to the image more quickly, but less accurately, by simply clicking and dragging guides from the image rulers and positioning them where you would like. | 
When you select , a dialog opens, which allows you to set the Direction and Position, in pixels, of the new guide more precisely than by using click-and-drag.
You can choose the Direction of the guide, either Horizontal or Vertical, by using the drop-down list.
The coordinate origin for the Position is the upper left corner of the canvas.