i want to use my signs on "c" ...if im doing that geralt is returning his sword into scabbard after usin signs(even in battles)

The "C" key is hard-coded. I suggest not trying to re-map that one.

Read this quick guide on Autohotkey. The script you need to use is very simple:

#IfWinActive, ahk_exe witcher3.exe
c::q

And that's everything. You can cast spells with 'C' and it won't sheathe your swords either.

So glad I stumbled onto this thread. I had re-mapped "c" to use my Consumable #1, which is usually Swallow or Thunderbolt, and I've died so many times because Geralt would sheathe his sword while using the consumable during combat. I thought this was CD Projekt Red's attempt at making combat a tad more realistic (since it's tough to swig potions while sword fighting). Glad I have a way around this now!

thank u too...