You can know set how you want your images to be treated in the Galleries and Techniques section when your looking for critique.

You will have three options:
  1. Edits OK
  2. Please Ask Before Editing Please
  3. No Edits Please
This will let members clearly state if they want their images edited as part of the critique or not.

All you have to do is click 'My Profile' top right of the forum page, under the heading 'About Your name' you will see the option 'Edit Permission'. Click on the pencil and select the one that suits you best from the dropdown menu.