Term/Symbol	Definition
X	Halide unless otherwise stated
R	Alkyl or Aryl group
Base	General base present
H-Base	General acid present
	Heat - may not be shown
	Positions on an alkyl chain relative to a functionality :
	X on either position 1 or 2

Points to note

1. Protonation/Deprotonation - If H-Base is present these are generally carried out in the step of the reaction in question.
2. Heat - This may not be shown to aid clarity in the reaction scheme.
3. Print Button - Prints the entire reaction mechanism with curly arrows but not the notes on the reaction.
4. Resonance/Delocalisation - It is not necessary for the user to draw this in.
5. Reaction Pathways - The reaction drawn may not be the most likely reaction outcome - the reactions shown are simply to illustrate the principles of the Named Reaction in question.
6. Notes - These are very brief and general - for further information consult chemistry texts or inquire from your teacher.