It is a common practise to use simile marks for repeated chords.
This simplifies the chord sheet and makes the actual chord changes more obvious.
Short cuts for the lazy ones to enter multiple bars of the same chords.
- Reprint a single bar A B C %1 - Two reprint in a row A B %1 %1 - Reprint two bars A B %2 - Reprint 4 bars A B C D %4 - Simile marks A B % % E F %%