Setting tab stops and indents
The horizontal ruler shows both the default tab stops and any that you have defined. To set the measurement unit and the spacing of default tab stops, go to Tools > Options > OpenOffice.org Writer > General.
You can also set or change the measurement unit by right-clicking on the ruler to open a list of units, as shown in Figure 53. Click on one of them to change the ruler to that unit.
Double-click on a blank part of the ruler to open the Indents & Spacing tab of the Paragraph dialog box. Double-click on the ruler itself to open the Tabs tab of the Paragraph dialog box (Figure 54).
To fine-tune tab stop settings, use the Tabs page of the Paragraph dialog box (Figure 54).