Guidelines are used at design time only. They are helpful to place and align keys. Key snaps to the line or to the intersection of lines. Keys can have the corners , the center or both magnetic. When they are snapped, the guidelines go from dashed to solid lines.

Their color goes from blue to red when they are selected. A mark shows the reference point of the guide (the center when it is a circle guide).

Guidelines also snap (the reference point) to other guideline or to the grid. They can be moved using the mouse or the Position dialog.

To temporarily disable the snap feature, keep CTRL pressed while moving.

Properties

When many guidelines are in use, the workspace can quickly become messy. The Group property allows to have only the usefull guidelines in view while others are hidden. See Snap options to learn how to show or hide groups.

Lines

Angle: The angle is in degree and is given from the reference point. A floating value is allowed. The Offset angle buttons allow to easily rotate the selected guidelines of ±1°.

Circle