Hi,
Here's how you could do it:
1. In the Variables window, right click and add one variable, let's call it myVar
2. In the expression editor for this variable, write the following expression:
RIGHT("0000000000" & [MyDataField], 10)
where:
"0000000000" is what we want to pad our field with. Here, we've decided to pad with up to 10 zeroes.
[MyDataField] is your data field.
10 is the number of rightmost characters the RIGHT expression will keep.
3. Use @MyVar@ to display the padded value of MyDataField
Hope this helps!