Download the file to your computer and open it in Adobe Reader.
Highlight the words. Open the Text Properties Box by pressing CTRL and E (or CMD and E on a MAC). (My files will not work on phones or tablets; only on computers.)
With the words highlighted, type new words right over top.
If you mess up, just go to Edit > Undo Typing. Then try again.
If the text properties box says "No Current Selection" just use your mouse to click on the editable text.
** All editable files are for PERSONAL USE only.
Read my other editable tutorials for more tips and tricks for editing your files.