Note the following when using the Anchored Object Options dialog box to position custom-positioned anchored objects.
The custom position options include four main options: The two Reference Point proxies and the X and Y Relative To menus. These options all work together to specify the object’s location. For instance, what you choose for X Relative To and Y Relative To determines what the Anchored Position Reference Point represents—it could be a text frame, a text line within a column, or an entire page. The following image represents how you can change the location of the object by choosing a different reference point while leaving the X and Y Relative To options unchanged.
To keep the object aligned with a specific line of text so that the object stays with that text when it reflows, choose a Line option from the Y Relative To menu.
To keep the object within the text frame, but not with a specific line of text when text reflows, choose Text Frame from the X Relative To menu.
To align the object relative to the margin (for example, to create a sidebar that stays in the outside margin as the text reflows from page to page), select Relative To Spine.