Question about default bytecode viewer

Where can i find the 'Editable' option like for the Krakatau bytecode viewer?  
I like how the default one uses brackets but i cant find the editable option for it. 
 
Thanks in advance!

Should be under View-Pane->Decompiler->Editable IIRC

So for example View->Pane 1->Krakatau->Editable