Ole’s tale: “Late night. The pale glow from the monochrome monitor of my Compugraphic phototypesetter. The smell of the office standard ‘French Vanilla’ coffee—warming, now, for several hours and resembling nothing so much as battery acid. The gentle snoring of one of the staff writers, who is curled up in the warmth of the unit that holds the filmstrips containing the fonts I’m using to set his story.
Sorry to hear it, but many thanks for the confirmation.  It will save me time looking for easier solutions.  I'll manually solve the problem this time, waiting until right before printing before I # the notes across docs manually, and think of a script if I continue to use InDesign after.  Still, I'm stunned that the coders have built in automatic page numbering, and yet not this.  Not much different for footnotes, as you suggest (check the final # of footnotes, increment by 1 and that is the # of the first footnote in the next doc), and as someone else mentioned. 
When you embed a series of images on a page, they typically look best when you align each image's left or right edge along the respective edge of the page. If you place them across the width of a document, they usually look best when their top or bottom edges are aligned. To align a series of images to the left or right down the page margin, click on the first image and then hold down the Shift key while clicking on each additional image until you’ve selected all of them. Next, click the Picture Tools tab on the Ribbon and click Format > Align > Align To Margin. Now click Format > Align > Align Left to align the images down the left margin, or Align Right to line them up down the right margin.
For example, imagine that we start a job with 2 colors, Blue and Yellow. Instead of applying these colors to each individual object, it is better to create two Color Styles and apply these to the objects (to create a new color style, select the object and right-click and choose > Color Styles > New from Selected…), If you need to use shades of each color (such as 10% of Blue, 20%, 30%, etc) you can choose "Create Gradient" on the same Color Styles docker (Window > Dockers > Color Styles), or (CTRL+F6).
Since the first version of Adobe InDesign was introduced, several improvements have been made for creating numbered lists. The Bullets and Numbering dialog box lets you modify a numbered list and updates automatically when you add or remove paragraphs in the list. You can change the type of bullet, numbering style, character style, separator, font attribute and indent spacing.
When you generate the index, each topic is listed, along with the page on which it was found. The topics are sorted alphabetically, typically under section headings (A, B, C, and so on). An index entry consists of a topic (the term readers look up) paired with either a page reference (page number or range) or a cross-reference. A cross-reference, preceded by “See” or “See also,” points the reader to other entries in the index, rather than to a page number.
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