This program lets you enter and maintain your material sizes.  You can enter both standard paper 
sizes and useful production sizes.  In the example above, in addition to sizes such as A4, the 
user has specified A4+ as a useful 'with bleed' size, so that in the details window of the 
calculation he only has to type A4+ and the system will insert the dimensions.  Also here are two 
popular business card sizes set up as BC1 and BC2.
At the top of the example 980MM has dimension 2 as 0.  This is because it is a continuous or 
web size.  
It is also worth noting that for paper supplies the second dimension is the grain direction.