A text file of a few pages and several paragraphs was read into LibreOffice Writer and needs to be double spaced throughout the document. The sequence:
Format -> paragraph -> Indents & Spacing -> Line spacing -> Double
affects only the paragraph where the cursor is positioned. Searching the web and help has not turned up a way to double space the document. (Although I'm certain I've done it before. Alas, I've got CRS (Can't Remember Stuff) syndrome.)
Best Answer
How can I double space a document in LibreOffice?
Select all the paragraphs (ctrl+a)
Right click and select "Paragraph"
Select "Indents & Spacing"
Set "Line Spacing" to "Double" and click "OK"
Change "Below paragraph" as well if you want extra spacing between paragraphs.
Before:
After: