Transposing means changing the key of a piece of music. By simply following the Roman numerals and remembering which chords are major, minor, etc, it is easy to transpose chords from one key to another. Here is the progression from Example 7.0 transposed to the key of G. Write Roman numerals under the chords and compare them to example 7.0. Then try transposing other chord progressions you know. Make a habit of transposing every new thing you learn and it will eventually become second nature.