servlets in eclipse

i recently installed the jEE web stuff for eclipse and awesomely found out that you can run the servlets inside eclipse = sweet :) *
and it will even display the html = exo :)

however, when i view the web.xml file which i automatically generated :)

i get this weird display , which is like an object representation of the different fields servlet,servlet mapping,welcome list etc....

but why wouldn't this be set up to edit or am i missing something ?

thanks




* old method run scripts to start and stop tomcat,transfer files,.. refresh browser ...

i think i've got an answer..
if you make a servlet... it gets added to the web.xml
if you copy over servlet or rename it doesn't change the web.xml file

thanks