Here’s a possible solution to a problem a student described about the requirement to insert a new left side page into a spread and thereby making the original page 3 end up as page 4, the image was then next to the spine, when it was meant to remain on the outer edge of the page.
Q. How can you create a facing page layout, that automatically keeps a mirror format relative to the spine of a facing page spread.
A. An example of this problem could be a two column facing page layout, that has a left front cover 1 spread in the middle and a back cover (page 6). You’d like to add another page to eventually change the content on one side of the spread. The spread page or pages has a design where a photo covers the top portion of the outside column and forces a text wrap away from all sides of the photo. The problem arises when you attempt to insert a single page into the left facing page of the spread. After doing so, the photo that was on the left on page 2 is now on the left of page 3 and therefore is no longer a mirror of the design structure (where the photo is always over the outermost column away from the spine).
The solution is to use an inline graphic container for the photos. Anchor the inline graphic and apply a conditional anchor based upon the anchor object’s position away from the spine. See the illustration.
The setting that you would set in the Anchored Object Options dialog box after selecting “Custom” in the drop down menu is to check the option “Relative to Spine”. Then set the Anchored Object’s Reference Point box so that it is selected on the left edge (automatically on the right edge as well) and in the middle vertically.
A Position of Custom, and Relative to Spine setting can also be applied to any object on the page including text as long as the object is inline in a text frame. The frame itself can hold nothing more than empty paragraphs with insertion points for the relative to spine aligned objects. To make an object an inline object quickly, leave a copy on the paste board. Copy it and paste it into the text frame as if it were text.
Upon insertion of an extra page. The photo will always anchor to the outermost column, in flow with the page break and inline with the appropriate position in the copy.