# Editing MathML Notations

The Author editor includes a built-in editor for MathML notations. To start the MathML editor, either double-click a MathML notation, or select the Edit Equation action from its contextual menu. In the MathML editor you can edit the mathematical symbols of a MathML notation. You can open a MathML file of your current project directly in the MathML editor. To do this, select Open with > MathML editor from the contextual menu in the Project view.

The font size and font family that is used for the equations is based upon the context in which the MathML equation appears. To configure the minimum font size of the equation, open the Preferences dialog box (Options > Preferences) and go to Editor > Edit modes > Author > MathML.