How to use LibreOffice Writer, Calc and Impress

• Open Tools → AutoCorrect → AutoCorrect Options.
• In the Options tab, check the Apply Borders box.
• Then enter --- and press Enter

Source:

• https://www.computerhope.com/issues/ch001321.htm

• https://help.libreoffice.org/3.3/Common/Selecting_the_Document_Language
• https://tipps.computerbild.de/software/officeprogramme/libreoffice-sprache-aendern-diese-moeglichkeiten-gibt-es-608435.html

• https://www.libreofficehelp.com/change-add-margin-writer-libreoffice/

• https://help.libreoffice.org/latest/en-US/text/swriter/guide/footer_pagenumber.html

• Go to fritz.box → Telefonie → Anrufe → Anrufliste → Alle Anrufe → Bottom of the webpage → Sichern
• Download the CSV file
• Open the CSV file in LibreOffice Calc
• Delete the first row
• Highlight the full table
• Click on Data → Pivot Table → Insert or Edit → Current selection → Ok
• Select the following entries for the Pivot table:
  • Filters: empty
  • Column Fields: Data
  • Row Fields: Name, Rufnummer
  • Data Fields: Count - Rufnummer (Make sure to change the default value of Sum - Rufnummer to Count - Rufnummer)
  • Ok
• Click on the Dropdown arrow of the column Name and only select (empty)
• Highlight the newly created Pivot table
• Click on Sort (AZ/ZA or Arrow down/Arrow up)
• Sort by Count - Rufnummer and Descending
• Done