Learn the route before the details
Write the section order from memory after listening once: introduction, verse, chorus, and whatever follows in this particular arrangement. Check it against the song rather than assuming a standard form. Notice repeated sections that differ in length or ending. Then name the opening chord of each section without trying to recite every change. This creates a small set of entry points. If you lose your place later, you have a route through the song instead of one long chain that only works when started at the beginning.
Pair sound with a useful cue
Choose a distinctive lyric moment near each important harmonic change and learn what the chord movement sounds like there. You do not need to copy full lyrics into a separate notebook; a brief personal description can identify the moment. Play the phrase with the synchronized display, then look away for the final few beats and predict the next chord aloud. Check your prediction before continuing. Avoid using identical repeated words as your only markers. Combine the cue with the section name or repetition number so similar verses do not collapse into one memory.
Test recall without making it all or nothing
Start from the chorus, then the bridge, then the second verse. Keep the display available and consult it when needed. Gradually lengthen the stretch you play without looking rather than hiding the screen for a whole song immediately. If memory fails at the same point, examine whether you understand the chord duration and section boundary there. Repeated rereading may not fix an unclear musical relationship. End each session with one accurate run using whatever support you need. The purpose of memory practice is spare attention for listening and expression, not proving that using a chord display is somehow a lesser way to perform.
Use a short break before one recall attempt. Returning after another task offers a different check from repeating the same phrase immediately, when the last few movements may still be fresh in your hands.