Thanks to various kind people on the Internet (Gearhead, NiLuJe, and others), here’s how I changed my Kindle 4 to allow left justification instead of the appalling full justification it produces out of the box. Much better!
1. Download Notepad++ Installer to your PC from
http://notepad-plus-plus.org. (You’ll need this software because Windows Notepad inserts the wrong kind of end-of-line characters, so I’m told.)
2. Run the Installer exe to install Notepad++ on your PC.
3. Turn on the Kindle.
4. Press the HOME button on Kindle.
5. Connect the Kindle to your PC with its USB cable. The Kindle goes into “USB Drive Mode.”
6. On the PC, open the Kindle “drive.” (In my case, it came up as the D: drive.)
7. In Windows Explorer, click ORGANIZE, then FOLDER AND SEARCH OPTIONS, then the VIEW tab. Under the ADVANCED SETTINGS section, select the radio button for SHOW HIDDEN FILES, FOLDERS, AND DRIVES. Uncheck HIDE PROTECTED OPERATING SYSTEM FILES. Click APPLY and then OK. A folder named “system” now shows up in Windows Explorer.
8. The file you want is in a folder within “system” named “D:\system\com.amazon.ebook.booklet.reader” and the file is named “reader.pref.” COPY and PASTE this file to somewhere on your PC (e.g., in “Documents”).
9. Make a second copy of the unaltered file on your PC, named for example “reader.pref_old.” (This is just a backup in case you mess up the editing.)
10. Launch Notepad++.
11. Open the copy of the “reader.pref” file on your PC.
12. Add the hack line to the bottom of the file:
ALLOW_JUSTIFICATION_CHANGE=true
13. Do FILE SAVE and FILE EXIT in Notepad++.
14. Now COPY and PASTE the edited “reader.pref” file from your PC back to its original place on the Kindle “drive.” This will prompt you to COPY AND REPLACE the original file.
15. Unplug the USB cable connecting the Kindle to the PC.
16. On the Kindle, do HOME button, MENU button, SETTINGS option, MENU button, and RESTART option.
17. Wait thirty seconds or so until the Kindle has completely restarted itself.
18. Go into a book on the Kindle.
19. Press MENU then select CHANGE FONT SIZE. You should now have an option to select JUSTIFICATION LEFT.
19. Here’s the tricky part. Some books apparently make changing the justification disabled. The justification options appear grayed out in this case. To get around this, find a book that allows justification changes, change the setting to LEFT in that book, then go back to the one where it was grayed out. It will still be grayed out, but your change to LEFT will remain in place.
20. I’m not a computer expert, so you use the above procedure at your own risk!