Guides (or Ruler Guides) are lines that can be placed on the document, useful for lining up and snapping elements. Guides can be a little non-discoverable in inkscape, so this article gives you a few quick tips to get the most out of guides in inkscape.
1. Quickly creating a guide
A guide can be quickly created by clicking on either the vertical or horizontal ruler, and dragging onto the canvas. If you drag from close to where the corners meet, an angled guide will be created:
2. Converting a path to Guides
Any object or path can be converted to guides Using Objects > Objects to guides (or keyboard shortcut Shift + G)
3. Deleting a guide
To Delete a guide, hover the mouse cursor over the guide, and press the Delete key on the keyboard.
4. Rotating a guide
To rotate a guide, hover over it with the mouse, and press the Shift Key. The cursor will change to a rotate cursor. Click and drag the guide to rotate it. Additionally, you can hold down the Control Key to restrict the rotate to 15 degree chunks.
5. Changing the colour of a guide
**Update** — thanks to twitter user @daishi424 for pointing out that the guide colour change is only in inkscape 0.91 (as yet unreleased) and newer versions of inkscape
To change the colour of a guide, double click the guide to bring up the Guideline dialog. Click the colour switcher button under the Label field to change the colour of the guide
6. Labeling Guides
**Update** — thanks to twitter user @daishi424 for pointing out that the guide labeling is only in inkscape 0.91 (as yet unreleased) and newer versions of inkscape
The Guidelines dialog (shown when you double click a guide) also allows you to set labels to your guides. These Labels are shown on the guide at the Guide Origin (the small circle that is on every guide)