Do you wish to truncate bits from the words or increase the number of words?

Truncate <value> bit(s) from the left side— Removes the deleted number of bits from the left side of the word.
Truncate <value> bit(s) from the right side— Removes the deleted number of bits from the right side of the word.
Do not truncate, increase number of words to <value>— Increases the number of words and places the truncated part of the word into the added cells.
Do not truncate, increase the number of words to <value> reversing order of new words— Increases the number of words and places the truncated part of the word into the added cells in reversed order.