This command can be found in the Edit menu.
This command will replace one word or series of words with another.
When you click on this command, a dialog box will come up. On this dialog box, there are two boxes that you can type into, the first is the box that you type the text that you want to find, and the second is the box for the text that you want to replace the text in the first box with.
Once you have entered text into both of those boxes, you can click on "Find nex" to just find the text in the first box. The next button is "Replace", this is to replace the next time that the text in the first box is found. The last button is "Replace All", this is to replace all the times that the text in the first box is found with the text in the seccond box.