You are initially opening these Pages '09 documents in Pages 5.6.1 Pages 5.1 can IMPORT pages 4 documents, When imported, the OPENED document is automatically changed to Pages 5.6.1internal format. The notice you are seeing is a warning that this version of Pages can edit ONLY documents in its own file version. If you want to make changes to the document, you have two choices:
- Click the button to update the file format, and continue from there. As you've noted, this makes the document unopenable by Pages '09 (Unless you also EXPORT a pages '09 version of the document).
OR
- Close the document. Quit Pages 5. Launch Pages '09. Open the unchanged document in Pages 09. Make your changes, then Save.
If you are doing this regularly, you can save yourself time by opening documents created using Pages '09 IN Pages '09, editing them in and saving them from that version of pages.
Three methods of opening these document in Pages '09:
- Put both Pages icons on the Dock. Open documents by locating the file in Finder, then dragging its icon to the Dock and dropping it onto the blue ink bottle if it is to be opened in Pages '09 or on the orange pen and page if it is to be opened in Pages 5
- Launch the version of Pages intended to open the file you will be working on, then use File > Open (or Open Recent) to open the document into that version of Pages.
- In Finder, locate and select (one click) a file with the .pages extension. Press command-I to open the Get Info panel. In the panel, go to the Open with… section and choose Pages 4. The click the Apply to all button to apply this instruction to ALL .pages files. *
*NOTE: the third method is suggested ONLY if the great majority of your Pages files were created in Pages '09, and you intend to keep them in that version. If you are currently creating documents using Pages 5.1, stick with the first two.
Regards,
Barry
PS: For future considerations regarding Pages, Please check Viking OS X's reply to Duckberg's question in this discussion: https://discussions.apple.com/thread/251852435
B.