It appears my original reply went direct to Satish; copied here for the list...
Satish Srivastava wrote:
In calc cell border is not giving the option of line style dash dash like
- - - - - - -this.
If we want to make our cell border is - - - - -. Can this is possible to
perform in OO.
Please help us if their is any add-on for this.
The following works for me (LibreOffice 4.0.4 on Windows Vista):
- Select the cells
- Format > Cells
- Choose the line style (for me, the 4th option is dashes)
- Set width and colour as needed
- Click the areas under "Line arrangement" representing where you want the borders applied, e.g. only around the outside of the selected region, or all the grid lines within as well, or only horizontal lines etc.
- Click "OK"
Does that not work for you? If not, I've no idea why but others may be able to help if you let us know what versions of LibreOffice and operating system you have.
If the grey grid lines are showing, other borders might not be so obvious while editing the spreadsheet as they are when printed. You can turn those off at Tools > Options > LibreOffice Calc > View, and set "Grid lines" to "Hide".
Mark.