Using the Ruler

To easily align expressions, click on the ruler above the text area to display a vertical line. Drag the pointer over the ruler or text area while holding down on the mouse button to move this line across the text area.

Basic equation-lines alignment can be achieved by placing the lines in a table and adjusting the column and row alignment of the mtable element. For more sophisticated equation alignment, you need to edit the MathML directly in a StructureEditor source-view panel, and use either a table with alignment markers (http://www.w3.org/TR/MathML3/chapter3.html#presm.malign) or the linebreaking indentation attributes (http://www.w3.org/TR/MathML3/chapter3.html#presm.lbindent.attrs).