Danielle,
Edit your formula, move the cursor to the reference you want to change and
press the [F4] key on your key board. Pressing [F4] will toggle all
Absolute/Relative combinations. For example:
"A1" pressing [F4] will get you --> "$A$1" [F4] --> "A$1"
[F4] --> "$A1" [F4] --> back to "A1"
HTH,
Conan