Cant copy symbol

This is probalby just some braininsufficiency by me, must be a standard use Im missing.

Creating a new symbol in the symbol editor I find no way to copy the symbol from existing library and modify it (as I did in footprint ed).

What am i missing ?

Right mouse click on the symbol in the list and select ‘duplicate symbol’, to make a copy in the same library. Use ‘save copy as’ to save it in a new or other existing library.

Ok didnt try save copy… The library Im copying from is read only, and there was no indication why copy and past would not work. OK Thanks, guess I need to create a new symbol library, save to this, and then open from that…

Indeed. KiCad’s own libraries are read only (Both symbols and footprints). And though it’s possible to make them writable, you should not do this, as they can be changed or overwritten during KiCad updates. Always maintain your own libraries for modified and self made symbols, footprints and 3D models.