You can use the horizontal ruler or the Text inspector to add a new tab stop.
If the horizontal ruler is hidden, click View in the toolbar and choose Show Rulers. To learn more about adjusting your ruler preferences see Changing Ruler Settings.
To create a new tab stop using the horizontal ruler, click the horizontal ruler to place a tab symbol where you want to set the tab stop, and then Control-click the tab symbol. Choose an alignment option from the shortcut menu.
You can also double-click the tab symbol repeatedly until the type of tab you want appears.
To create a new tab stop using the Text inspector, click in the document where you want to create a new tab stop, click Inspector in the toolbar, and then click Tabs. Click the Add (+) button in the bottom-left corner of the Tabs pane. The new tab stop appears in the Tab Stops column.
To align text at the tab stop, select the tab stop, and then select an alignment option:
To change the tab stop location, double-click the tab stop in the Tab Stops column and type a new value.
To specify a decimal tab character for the document, type a new character in the Decimal Tab Character field.
To add a dashed or dotted line to the tab, choose a line style from the Leader pop-up menu. Otherwise, choose None.