To zoom text while editing it, do one of the following:
On the Articles main tab
On the WYSIWYG pane, hold CTRL and then rotate the mouse wheel.
Note: since the version 2.1 the zoom is supported also in the source pane.
On the Pages main tab
•While editing text on page, hold CTRL and then rotate the mouse wheel.
•While editing text in the Text Editor, hold CTRL and then roll the mouse wheel.