In the 13.X branch of cscope there was a "Find assignments to" search item. This mysteriously disappeared in the 15.X branch.
It was a very useful search criteria. For example if there were many instances of symbol "counter", and you did a "Find assignments to: counter", you would only get the following
counter = 55;
int counter = 0;
and you would skip all the declarations, etc. Without this option, you had to do a 2 step process: first, do a "find this symbol", then weed out the non-assignments manually.
Please consider adding this option back.