You can edit text in place and change the formatting of an entire text block. Note that you can't edit text that is linked directly to data values. For example, you can't edit a tick label because the content of the label is derived from the underlying data. However, you can format any text in the visualization.
Double-click the text block. This action selects all
the text. All toolbars are disabled at this time, because you cannot
change any other part of the visualization while editing text.
Type to replace the existing text. You can also click
the text again to display a cursor. Position the cursor in the desired
position and enter the additional text.
Select the frame containing the text. Do not double-click
the text.
Format text using the font toolbar. If
the toolbar is not enabled, make sure only the frame containing the text is selected. If the text itself
is selected, the toolbar will be disabled.

You can change the font:
• Color
• Family (for example, Arial or Verdana)
• Size (the unit is pt unless you indicate a different unit, such as pc)
• Weight
• Alignment relative to the text frame
Formatting applies to all the text in a frame. You can't change the formatting of individual letters or words in any particular block of text.