How to obtain the list of all user variables created in a document

Questions
1

Hi,
Can you help me to obtain the list of all variable declare (non-zero) in a document ?
Thank you

2

Hi. I’m not sure I understand the question completely. If you want to see what variables have been used in a session, evaluate:

Information["Global`*"]

or

Names["Global`*"]

These basically list what is in the Global context, which is the default context for where variables live.

3

Thank you, this is what I want.
Marcel.