This method (https://help.libreoffice.org/Writer/Removing_Line_Breaks) does not work correctly to remove line breaks after copying and pasting texts from other sources (PDF or WEB). It is much more practical and simple to select the text where we want to remove line breaks, selecting "Find & Replace", writing $ in the "Find" box and pressing the "Replace All" button.
Steps to Reproduce:
1. Tools - AutoCorrect - AutoCorrect Options
2. Options tab, ensure that Combine single line paragraphs if length greater than 50% is selected, and then enter a new percentage. <OK>
3. In the Apply Style box on the Formatting bar, choose “Default”.
4. Format - AutoCorrect - Apply -> Wrong route, maybe it's Tools - AutoCorrect - Apply ... but does not work correctly to remove line breaks.
Not work correctly to remove line breaks
I expected the same thing that is done correctly with "Find & Replace" and the $ symbol in the "Find" box.
User Profile Reset: No
I have tried in all possible ways varying even the percentages from 0% to 100% in "Combine single line paragraphs if length greater than 50%" and it does not work.
I can't confirm it with
Version: 220.127.116.11 (x64)
CPU-Threads: 4; BS: Windows 10.0; UI-Render: Standard;
Gebietsschema: de-DE (de_DE); Calc: group
Version: 18.104.22.168.alpha0+ (x64)
Build ID: 48cfa0b00b22f11ade53aec79b2fdddad253e1bd
CPU threads: 4; OS: Windows 10.0; UI render: GL; VCL: win;
TinderBox: Win-x86_64@42, Branch:master, Time: 2018-10-03_02:01:42
Locale: en-US (de_DE); Calc: CL
I used the steps from  but I can't see a difference to the steps from the oöd help.
Report is that "Combine single line paragraphs if length greater than..." doesn't work. It seems to me that reporter is right.
Dieter, what does it mean you can't confirm? If it works for you please explain how and give example document. Or you understood it differently?
Created attachment 145373 [details]
Video capture of the problem described in the first comment
I accompany a video capture where I first verify the possible failure following the instructions of "Removing Line Breaks" in https://help.libreoffice.org/Writer/Removing_Line_Breaks and how in the end I solve it with a trick of "Find & Replace" (I have lowered the quality of the recording I hope it is displayed well)
(In reply to Tonyab from comment #3)
> Created attachment 145373 [details]
> Video capture of the problem described in the first comment
I'm sorry, but I couldn't see anything in the video.
I couldn't reproduce it with 65%. I followed the steps from the online help
Created attachment 145377 [details]
Video in FLV format
All right! I send you the video in FLV format. If you see it from your mobile it is possible that you need a video viewer like VLC. In principle from the computer I can view it in both formats.
(In reply to Dieter Praas from comment #4)
I have tested from 0 to 100% in version 22.214.171.124. and it does not work. I send you the video in FLV format attached in comment 5, I hope you can see it.
Thanks you for the video. Now I can see the difference.
I used line breaks (ctrl+enter) and not paragraph breaks.
The example in the video consists of changing the style of a block of text (with many short paragraphs) to Preformatted Text. With this I can repro even in 3.3.0.
Arch Linux 64-bit
Build ID: 9a373521d7a328197a4bf9abeb0a981b7acba896
CPU threads: 8; OS: Linux 4.18; UI render: default; VCL: gtk3_kde5;
Locale: fi-FI (fi_FI.UTF-8); Calc: threaded
Built on 19 October 2018
Arch Linux 64-bit