## Adjust Last Touched Parameter
I posted about this [in this Reaper Forum post](https://forums.cockos.com/showthread.php?t=284789).

This script does the *adjust by X' for us:
```lua
-- inc_last_touched_param.lua
function inc_last_touched(rel)
  local retval, tracknumber, fxnumber, paramnumber, val, track
  retval, tracknumber, fxnumber, paramnumber = reaper.GetLastTouchedFX()

  if retval then
    track = reaper.GetTrack(0,tracknumber-1)
    val, minval, maxval = reaper.TrackFX_GetParam(track, fxnumber, paramnumber)
    val = val + rel
    if val > maxval then
      val = maxval
    end
    if val < minval then
      val = minval
    end
    retval = reaper.TrackFX_SetParam(track,fxnumber,paramnumber,val)
  end
end
```
And then we can create multiple actions thus:
```lua
-- thanks to https://gist.github.com/X-Raym/f7f6328b82fe37e5ecbb3b81aff0b744
-- for the dofile trick
local script = "inc_last_touched_param.lua"
local script_folder = debug.getinfo(1).source:match("@?(.*[\\|/])")
local script_path = script_folder .. script
dofile(script_path)
inc_last_touched(0.01)
```