OO does not have one VERY USEFULL feature (easy to implement): GO BACK - like 
in web browser. 

This is very usefull in many situations and soothes very much browsing in 
complex documents. Every time you use Navigator for jumping to some part of 
document (heading, bookmark, etc.) you may need to go back either immediately 
(you have not found what you were looking for) or after some editing. This 
especially holds for any type of reference - usually you follow it to 
look/correct st. in at the referenced place, but you want to very often to come 
back after where you had been before to continue work.


PS: MS Word have this and I use it quite extensively.