We have released a new version of FX Equation that greatly improves its usability.

The new vertical mode splits your screen vertically instead of the traditional horizontal split. This makes it much easier to manage long solutions.
If you don’t like the new view, you can always switch back to the old style by pushing the horizontal style button (see above).
We have also added line highlighting which shows you the line currently being edited. Combined with greatly improved side-by-side scrolling, it is now much easier to create long equations without getting “lost”.