[Exporting Pages as JPEGS with no .JPG extension]

Summary:  Choosing to export a JPEG without selecting a JPEG Preset results in a file with no .JPG extension.
 

[Exporting pages to JPEGS ignores image size once set.]

Summary:  The export function fails to export JPEGs at set sizes globally.
- Chose File>Export
- In the dropdown, choose Area: All Pages, JPEG, set a size eg 1200 x 800.
- Select Export, choose a destination.  Images are exported, only first page exported at correct size, others are full size.

[Cannot globally change page size after a document is created]

Summary: Working on a document, decide to change the page size, find it impossible to do globally.  Must do it page by page.

Approach: I expected to be able to change
- Initially Document Setup for overall dimensions but not available.
- Then the master page, then apply that to the existing pages, but it had no effect even when Apply Master was used.
- Then selecting all pages and choosing Spread Setup and changing dimensions but only the initial selected page was changed.

Result:  had to do it page by page.