Can I override auto file extension, or add a custom file extension?

I want to be able to save a file with the extension .adi. ADIF (Amateur Data Interchange Format, *.adi) is a filetype used in amateur radio logging. I create the file in Calc then Save As as a Text/CSV file. If I try to save as MyFile.adi LibreOffice appends .csv to the end of my filename. I know I can rename a file after saving but that is an inconvenience.

Do you mean “How to Uncheck Automatic filename extensions”? This is a checkbox on Save as… form

And what makes you assume, that a file having extension .adi is a ADIF file. Have you written your own export filter for that file format (the only export which sounds similar is dif)

@anon73440385 Judging by the phrase DXKeeper can import ADIF-compliant log files, and tab-delimited files saved from spreadsheet applications no need special export filter

JohnSUN: Tnx reply. I do not get a checkbox to disable Automatic filename extensions on the Save as form. I am using version 6.0.7.3, was this checkbox added in later versions?

Opaque: I make no such assumption. My file is formatted according to the ADIF spec.

SOLVED: The “Automatic file name extension” checkbox was missing from the “Save as” dialog. This was fixed by going to Tools|Options|Open Expert Configuration|org.openoffice.Office.Common|Misc|UseSystemFileDialog and changing the setting from “true” to “false”.

The “Automatic file name extension” checkbox is now visible in the “Save as” dialog. Thanks to all who responded.
CLOSED.

@va3kot UseSystemFileDialog? Did you have to go that deep? Wasn’t the Open/Save Dialogs option available in Tools - Options - LibreOffice - General? 73

@JohnSUN I’m not sure. I googled “Calc automatic file name extension checkbox missing” and came up with something very similar to the solution I posted. I did a little bit of poking around in the config, found UseSystemFileDialog and set it to false. Your solution may indeed be much simpler. I also installed version 7.1.1.2 over the older version that came with my Linux distro. Thanks for your helpful suggestions.