Adobe InDesign - Manual (Page 374)

Relative To Spine
Note:
Anchored Object Reference Point
Anchored Position Reference Point
Note:
positioned anchored object .
Specifies whether the object aligns relative to the document spine. When you select this option, the Anchored Object
Reference Point proxy displays as a two page spread. The two pages mirror each other. When selected, objects positioned on one side of a
spread, for instance the outside margin, remain on the outside margin even when the text reflows to a facing page.
Using the Relative To Spine option
A. Relative To Spine not selected: the object remains on the left side of the text frame when text reflows across to the right side of the spread. B.
Relative To Spine selected: the object remains on the outside edge of the page when the text reflows to the right side of the spread.
If, after you select Relative To Spine you adjust the X Offset value, the direction the object moves may change. This change occurs
because the direction of movement depends partly on the side of the spread the object is on.
Specifies the location on the object that you want to align to the location on the page (as specified by the Anchored Position Reference Point). For
example, if you want to align the right side of the object with a page item, such as a text frame, click a rightmost point on this proxy. For more
information on using this reference point, see
Position a custom-positioned anchored object .
Specifies the location on the page (as defined by the X and Y Relative To options), to which you want to align the object. For example, if you
choose Text Frame for X Relative To and Line (Baseline) for Y Relative To, this proxy represents the horizontal area of the text frame and the
vertical area of the text line containing the object’s anchor marker. If you click the leftmost point on this proxy, the object’s reference point will
align with the left edge of the text frame and the baseline of the text.
Right side of object aligned with left side of text frame
Depending on what you choose for X Relative To and Y Relative To, the Anchored Position Reference Point proxy displays either three or
nine positions. Line options, such as Line (Baseline) provide only three options—middle left, center, and middle right—because the vertical
positioning is established by the anchor marker in the text.
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