The Find and Replace function in Microsoft Word is extremely useful, but I can't always make it work the way I want. For example, if I want to change the color of every instance of a specific word in a document, I can't put an example of that word in color into the Replace with box. And the same holds for symbols—I am trying to remove a symbol from scanned documents but can't do that either.
It's true that you can't type a colored version of your search term into the Replace with box, but you definitely can use Find and Replace to change formatting. Type the word you want to color in the Find what box. Click on the More button to expand the Find and Replace dialog, and click within the Replace with box to select it. (Even if it was selected before, clicking on More switches back to the Find what box). Click on the Format button at the bottom of the dialog and choose Font from the menu that appears. Select the drop-down arrow under Font Color and choose the color you want. The Replace with box remains empty, but the formatting to be applied is listed below it. When you click on the Replace All button, that formatting will be applied to everything that matches the text in the Find what box.
As for using a symbol in the Find and Replace box, the easiest way is to copy one instance of the symbol to the clipboard and paste it into the Find what box. By the same token, if you want to replace specific text with a symbol, you can create one instance of the symbol, cut it to the clipboard, and paste it in the Replace with box. Just select Insert | Symbol from the menu, find the desired symbol, and click on Insert. Cut that symbol to the clipboard, paste it into the Replace with box, and you're ready to go.