Right-click a column in the preview to set the format or to hide the column.
You can preview the layout of the imported data at the bottom of the dialog.
On the Text Import dialog (below), select the Separator options to divide the text in the file into columns.
If the file has another extension (for example, *.txt), select the file otherwise select Text CSV in the File type box (scroll down into the spreadsheet section to find it) and then click Open.
If the file has a *.csv extension, select the file and click Open.
Locate the CSV file that you want to open.
The list displays the last 10 files that were opened in any of the OOo components. This list can be accessed from the File menu, directly below Open. You can also open a spreadsheet that has been recently worked on using the Recent Documents list.