hi there,
you can try to change some settings in the plugin manager, for example for tinymce as seen in the screenshot:
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anyways, if you are serious about webdesign, try to learn some basic html instead.
these wysiwyg editors can make your life easy but also really hard.
a great place to learn html is
w3schools.com/
also, do not copy/paste anything from word etc into your joomla articles, those programs use code that has nothing to do in a website and can even break the layout completely.
kat