Use the drop down menu "Options", and select "Environment Options". Now click on the "Editor" tab. To make tabs tabs and not spaces, deselect the option: "Tabs to Spaces". To remove the smart indentation, deselect the option: "Auto-Indent". To get rid of smart tabs completely, deselect "Use smart Tabs". To customise the default spacing of the tabs, use the "Number of space for a tab" text box.
Explore this area a bit. There are tons of options from syntax color, to fonts, to how the windows behave, to scrolling etc..
Hope that helps.
-Justin
