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Description: Changing the default printer does not save. 
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In LibreCalc it is possible to select a default printer. 
This feature is helpful because it eliminates the need to 
select the desired printer every time the spreadsheet is printed.

When the default printer is changed, the Save Icon on 
the top menu bar should change appearance
and should become active so the user can save the change. 

However, changing the default printer only affects 
the current session and does not prompt the user 
to save the change. Instead the Save Icon does not 
change appearance and does not allow the user to save changes. 

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REPRODUCING THE PROBLEM:
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1. Open a new LibreOffice Calc document on a machine having several 
printers.  
2. Enter "asdf" in Cell A1.
3. Save the file as "Test01.0ds"

4. Go to "File>Printer Settings..." in the Menu.
5. Make note of the Selected Printer.  
	(In my case it is "Brother HL-L2390DW".)
6. In the drop down select another printer.  
	(In my case I selected "OneNote")
8. After making the new selection, click the "OK" button.
	NOTE: The floppy disk save icon in the menu bar
	does not change to indicate a save is necessary 
	and does not allow the user to save the 
	printer setting change. 
9. Before closing the document. Go to "File>Print..." in the Menu. 
	NOTE: The newly selected printer shows as the default 
	in the dialogue box. 
10. Click the "Cancel" button. 
11. Close the document by clicking the "X" in the upper right of the window.

12. Re-open the document "Test01.ods". 
13. Go the "File>Printer Settings..."
	NOTE: The original default printer is shown and 
	changes were not saved. 
14. Click the "Cancel" button.
15. Go to "File>Print..." 
	NOTE: The same default printer is shown in the "Print..." menu. 
	The changes are not shown here either. 

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WORK AROUND: 
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To work around this problem and save a different printer as 
default for Calc document, first make a different change 
to the document which activates the Save Icon. 

For example, one could add a character in a cell and 
then delete that character from the cell.  
This trivial change activates the save icon in the menu and 
allows the user to save the change to the cell.  
Doing so also saves any changes made to the default printer
settings since the document was opened. 

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Environment and Software Versions:
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LibreOffice Version: 6.0.7.3 (x64)
Build ID: dc98aa7a9eabfd848af146d5086077aeed2ae4a5
CPU Threads: 4; OS; Windows 10.0; UI render:default;
Locale: en-US (en_US); Calc: CL


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Related Comments:
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I have not verified that this is exclusive to LibreCalc.  
It may also effect other programs in the LibreOffice Suite.


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Other Bugs that may be related:
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104698 printer settings not saved in DOCX files