Why these horizontal lines?

[opensezame]

I still have no idea as to what these horrid artifacts are called and where to go to eliminate them, and prevent their insertion.
I have spent an hour looking and trying to reset options.

[RoryOF]

They arise, as has been explained, from use of three punctuation characters as a scene or spacing break in a document, at the start of a line. To prevent their future occurrence if they occur while typing, in /Tools /Autocorrect Options, on the Options tab, uncheck "Apply Border" in the [T] column.

To remove existing lines, click in the paragraph immediately above the top line, select /Format /Paragraph, and click on the leftmost icon of "Line Arrangement" on the Borders tab. Repeat this as you work down the intruding lines.

[Hagar Delest]

On the total width of the page?
Has the text been pasted from somewhere else? It may be HTML formatting from the source.

[floris v]

Seems to be a follow-up of this one. I don't think this is the effect of autocorrect turning three dashes into a line - that'd be much thinner.

@opensezame: please attach a small file with those lines in it, a screenshot tells us nothing. The lines might be a failure of your monitor or other hardware for all we know. I've been around at this forum and an earlier one for some fifteen years, and am fairly certain that I never saw anything like this. That must mean something.

[RoryOF]

You are correct, floris v; if they came from the three character automatic line, they would not extend beyond the margins, as they do in the screenshot.

[floris v]

Lol Rory, I missed that.

[RoryOF]

Look at the screenshot on opensezame's earlier thread on this subject
viewtopic.php?t=102938#p498149

They seem to occur also on the screen area, off the document. That makes it look like a computer problem, possibly a graphics driver problem. I suggest turning off /Tools /Options /OpenOffice /View : "Use hardware acceleration" and "Use Anti-Aliasing", then restarting OpenOffice.

What is the resolution of the screen?