Dreamweaver 4 has been really pissing me off lately regarding the identation displayed in Dreamweaver's Source View and displayed in Internet Explorer's Source View which results in opening the source in Notepad most of the time.
Indentation - from the word dent-, tooth, in latin
Don't blame DW, the problem is the tab size in notepad
I don't know how to change that value, but I know how to change the "view source" app used by IE:
Create a registry key with the name
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\View Source Editor\Editor Name
and set the default value to