OK, here's what I'm currently doing:
1-Open the Find database object window and search for a string that is found inside a package body
2-Double click and the code is displayed. The first occurrence is selected.
3-Now I want also all other occurrences colored and to be able to move with F3 (find next). Since this is not possible, I copy the selected text and paste it inside the search box and press Find. OK
But when I repeat these steps, searching for another string in the database objects window. The copied form source text can not be pasted.
Please try this