Determine what key the sheet music is in. The key is determined by how many sharps and flats are in the key signature.
Decide what key to which you want to transpose the sheet music.
Determine the interval between the original key and the key to which you want to transpose.
Copy the clef for each staff onto the staff paper as it is written on your original sheet music. Then write in the key signature (sharps or flats that appear throughout the piece) to the left of the clef and write in the time signature.
Copy each note to the staff paper, raising or lowering it based on the interval between your original key and the new key. For example, if the original key is C and you are transposing to G, then all notes need to be raised up a 5th or lowered by a 4th. Continue until you have written in all notes and then write in additional information, such as dynamics and tempo markings.
Open a new Finale document and select the instruments, original key, and time signature of the music.
Using the simple entry or speedy entry tools and your computer keyboard, enter the music notes as they appear on your sheet music. (For speedy entry, you may need to refer to the help menu if you are not familiar with what note values correspond to the keypad numbers.)
Click on the "Key Signature" tool.
Under the file menu, pick "select all."
Double-click anywhere in the selected measures to bring up the 'Key Signature" tool. Select the new key for the music and choose whether you want to bring the notes up or down to meet the new key. Click "ok" and you're done, aside from printing or saving your work.