Yes, there certainly is a way to understand the key mapping of Spanish language characters when you've enabled the Spanish keyboard on Windows 11. We don't have a document, but here's a detailed description that should act as a guide:
1. Accented vowels (á, é, í, ó, ú): Press the right Alt key (also known as the AltGr) at the same time as the vowel.
- Alt + a = á
- Alt + e = é
- Alt + i = í
- Alt + o = ó
- Alt + u = ú
2. Umlauts (ü): Press Alt + "y" to get "ü".
3. Ñ: To type "ñ", press Alt + n
4. The ¿ character: To type "¿", hold Alt and press the "/" key.
5. The ¡ character: To type "¡", hold Alt and press "1".
6. The º sign: To type "º", hold Alt and press "0".
Take note that the specific keys may slightly vary depending on whether you have enabled the Spain Spanish keyboard (Spanish, Espanol - Espana) or Latin America Spanish keyboard layout (Spanish, Espanol - Latinoamerica) or any other regional Spanish variant.
You could also open the On-Screen keyboard (easy access through the Windows search bar) to see exactly what each key will produce when pressed together with shift or alt.