The magic of the Bijoy layout lies in its use of the "Shift" key. The PDF layout clearly distinguishes between keys pressed normally and keys pressed while holding Shift. For example, pressing k might give you the consonant 'ত' (ta), while pressing Shift + k might yield a completely different vowel or symbol. The PDF chart demystifies these combinations.
The arises because:
Consonants take up the majority of the keyboard. bangla bijoy keyboard layout pdf