Choose .
Select text, choose (automatic spell checking must be disabled).
From the tabbed interface:
On the menu of the tab, choose .
Open the deck, select a paragraph style, open context menu and choose or .
From the tabbed interface:
Select a text object, choose .
On the menu of the tab, choose .
Select a text object, choose .
From the tabbed interface:
On the menu of the tab, choose .
Select text when editing a cell, choose .