Texpad's editor supports gestures to aid your writing. There are many gestures on the edit pane of the magic keyboard, but they are discussed separately in the keyboard article.
Swiping two fingers left or right on the editor view will move the cursor left or right, swiping two fingers up or down will move the cursor up or down.
Select text and swipe three fingers right to comment out LaTeX source, and left to uncomment it again.