Another way to change rows while playing is to assign specific keys. This is shown as a vertical green bar across the keymaps area. You can drag the whole column to the key of your choice and can increase/decrease its scope by dragging its right border.
The keys covered will appear in this button. Thus, when you press a key in the range, it will jump to the corresponding order. Also if you click that button, SwarPlug will jump back to the first row when you release the key. Otherwise you'll have to press on the first key in the range yourself.