| Tap option | Answer immediately β β green / β red + explanation |
| 1β9 / AβE | Answer that option |
| Enter | Check / reveal Β· press again for next |
| R / Space | Reveal without scoring |
| β β / P N | Previous / next (swipe on mobile) |
| M / F | Bookmark / flag |
| S | Source panel |
| K / X | Self-assess known / review again |
| T | Cycle Light β Dark β Cream (low blue light) |
| A+Aβ | Text size |
| Focus | Hide study chrome and show only the question, answer controls and explanation. |
| / | Search |
| 0 | Clear selection |
| ? / Esc | This help / close panels |
Banks: switch π¬π§ UK MCQ / ππ° HKCOS in the header or Filters. Progress (answers, bookmarks, flags, notes) is saved separately per bank on this device and survives reload β use Export for a portable backup.
Mobile: big tap targets, bottom Check/Next bar, swipe β/β to move, haptic buzz on wrong answers.