You enable FX text by right clicking a track header and select "FX text".
FX text format: xxt, where
xx = effect value. 0 = lowest value, ff = highest value. (hex format) t = Whether to glide to the next effect or not (denoted by '|').
A special situation:
Let's say you have an fx with two nodes. The first node has the value '6e|', and the second node has the value '28 '.
Q: Will the value 28 be sent to the instrument?