How can count number from 0 instead for 1.

I have a problem with the count action.

If I use this one in HTML:
[blkName.$] -> always write 1 for the first.

How can I make it count from 0.

Thanks

I'm sorry! My mean is:

If I use this one in HTML:
[blkName.#] -> always write 1 for the first.

How can I make it count from 0.

Thanks.

With TBS 3 : you can use parameter "ope=add:-1".