The problem with this approach is that when you choose Edit > Copy Special >
Character Format, it copies ALL of the formatting of the selected text, not
just those of the character format applied to it. When you replace by
pasting, you will be pasting more than just the character format's
No need for plugins.
Select some text formatted with the char format you want to apply. Select
Edit - Copy Special - Character Format. Then, in the Find/Replace box,
choose to find a character format. Set the dialog to As Is (Shift+F8), and
choose Bold in the Weight box. OK out. Then, in the Replace box, choose to
replace By Pasting. Replace all, and you should be done.