It seems you are referring to a key on the keyboard that can be used to type a letter by the left pinky finger (L1). In the context of keyboard input:
- The left pinky finger typically is used for the "A" key and also the "Q" key.
- Using the left shift key (which is typically operated with the left pinky) allows you to type uppercase letters or special characters.
Given the context, it seems you might be asking what action is performed with your left pinky finger to key a letter while holding down a key.
If you are asking which key corresponds to the left pinky (L1), the answer is likely the "A" key on the bottom row of the QWERTY keyboard or the left shift key for capital letters.
If you provide more context or clarify the question, I can assist further!