removing indentation and controlling tab width

Hi there,

I am new to ZIM.

I would like to find out _if_ it is possible to stop ZIM from indenting and formatting text for me ( it appears to do that ) and how to do this ( couldn't find anything in the Manual, Help or the settings ).

Furthermore can one set the tabwidth for ZIM?

P.S.:
    Many thanks for making ZIM freely available. Great tool.
    I am using ZIM to create a documentation wiki from the many technotes I've gathered over the years.
    My notes were created entirely as text files using vi and they contain tons of diagrams using ASCII 'art' which I prefer to simply import _untouched_ from their pure text version.
    Any `auto-magic` formatting or tabbing would obviously mess with that and cause tons of extra work obviating the benefit of migrating to ZIM from pure text.