HOW_TO

        [ADVANCED\]HOW_TO  solve a simple problem

      Ask  IMAGER  informations to help you solving your problem, expressed in a
    natural way. Examples
      HOW do i subtract continuum ?
      HOW do i control the display ?
    Rules:
      - simple words ("do" "i" "?" "the", etc...) are ignored. You can just
        type them to have a normal syntax in your question.
      - all significant words (e.g. "subtract" and "continuum") must be
        found to have a matching topic.
      - significant words use exact matching. "continuum" is not the same as
        "cont".
      - partial match is possible if a significant word ends up by *.
        "cont*" will match "continuum".
      - if no topic matches all significant words, a list of partial matches
        is given to guide you. Use a simpler question with less significant
        words among those proposed.

       HOW_TO ?
      will list all topics