To each leaf

A value which you write to a parent cell is written to each child cell. The value of the parent cell changes accordingly.

Base allocation: #B[value]:

A value which you write to a parent cell is written to each child, replacing the existing value.

Example:

A parent cell has three children. You write 2 to the parent cell with base allocation. The value of each child cell becomes 2. The value of the parent cell becomes 6.

Base alteration: &B[value]:

A value which you write to a parent cell is written to each child and added to the existing value.

Example:

A parent cell has three children. The value of each child cell is 2. Therefore, the value of the parent cell is 6. You write 2 to the parent cell with base alteration. 2 is written to each child cell and added to the existing value. The value of each child becomes 4. The value of the parent cell becomes 12.