Question

the small black square that is used automatically fill data into empty cell​

Answer 1

Answer:

When you're working in Excel, the active cell has a Fill Handle -- a small black square at its bottom right corner. When you point to the Fill Handle, the pointer changes to a small black plus sign. You can drag the Fill Handle, or double-click it, to activate the AutoFill feature.

Answer 2

Explanation:

When you're working in Excel, the active cell has a Fill Handle -- a small black square at its bottom right corner. When you point to the Fill Handle, the pointer changes to a small black plus sign. You can drag the Fill Handle, or double-click it, to activate the AutoFill feature.