editable files on Kindle3 like htm/txt

[tocatoca]

Up to this time i've figured out that i can easily read htm/html files made in word or openoffice. of course i do it on my kindle device just by changing the file extension to .txt

the problem is that, kindle displays those files with approximately 2cm-long margin!

does anybody know how to make it smaller. i suppose modifying system file- pref. won't work.

i search for the easy way to view my own files that have basic formatting like bold or italic type without using conversion to mobi :/

best greetings for all owners of all new kindle 3 only for 139$ ;-)