i have [MistyLook] as my blog theme. i want to change it from 2 columns to 3 columns. 3rd column will have a vertical menu. is it allowed to modify the layout [HTML] of the theme to add the 3rd column. i know CSS can be modified but can HTML be too? i've looked everywhere in my account for an option to EDIT THEME but have found none.
also, is the width of the blog fixed or can be changed to, may be, 1000px? currently its 780px.
last question, can we download the source files of the blog + db dump to set up locally and do all the styling and modifications locally before applying them to the actual blog?
thank you very much in advance for all the help and support.
The blog I need help with is sequoialab.wordpress.com.