Think of Table styles and working with hundreds of tables in your documents... and then the sudden need to change those table into showing no repeated headers (and then back into repeated headers again).
Using Table styles, header rows can not be styled differently from body rows, unless they ARE marked as headers.
If you've only got one table in your document, the problem is not a big one. The thing is that you can not change this behaviour and apply (or keep) such a special formatting for header rows, that you mention, on many tables at once.
Example: Last year I imported xml (with head AND cell data marked up separately), creating 100s of tables in a document with headers repeated for each column. I used a table style to set up separate formats for headers and body cells. When almost all the manual touch-up was done in the document our customer decides that the headers are not to be repeated. Since InDesign lacks the ability to change this in a simple way we had either to change all this manually (converting row by row) or via scripting, calling "Convert to Body" and explicitly setting individual Cell styles for the top-most cells.
The number of header rows may also be more than one for each table: It's no a good idea to recognize a type of data (header contents) just by its formatting attributes. If you want to do something with all header rows, you can't just make a script that affects all "first rows" of all tables, you need to check some part of a style attribute.
So yes, we want them to be header rows, not to lose their status as headers, in case we'd like to change their behaviour back into repeating headers or change their formats.
I'm sorry to say, but your detailed explanation doesn't make it easier to understand the purpose of your request.
You can put XML files of your own with new GREP query definitions in this directory: C:\Users\[your user name]\AppData\Roaming\Adobe\InDesign\Version 13.0\en_US\Find-Change Queries\GREP
And if you want to, I'm sure you can direct the above folder to another path using a Symlink (ln -s) on Mac, or a junktion on Windows using the mklink /j command.
Perhaps this information solves your question?
@Jongware: InDesign has an option to save preview *images* with documents. That makes it possible to see those images in InDesign even when the actual links are missing. As I recall that works fine. If it's that setting, that you think of, it has nothing to do with previewing documents in the operating system or in Adobe's own software. Is there another setting?
I can't see a great purpose previewing InDesign documents in the file system – isn't that what bridge is for?
We have fixed a number of crashes with InDesign’s latest Nov’17 update.
Please download the latest InDesign version (InDesign CC 13.0.1) for the fix.
List of crashes and other issues that have been fixed with the update can be found at the below provided link:
If you are unable to see the update yet, go to Creative Cloud application, click on the context menu on the top right and click on Check for App Updates.
Between 1 and 2 in the description above, you need to select a node in the XML Structure, to reproduce this behaviour. Then you can't use the page panel to change page.
Well... you obviously have some kind of screen shot function associated to that keyboard shortcut. You need to remove that (either the shortcut or the whole program unless you want to keep it) to let InDesign use the shortcut.
This has nothing to do with InDesign or Adobe, it's just a program that you have installed or that came with your computer.
Another way is to assign another keyboard shortcut to the "Insert White Space: Non breaking space" menu command. You can do that in the Edit / Keyboard shortcuts... menu of InDesign.