Each tabbed heading has a Grid Type option.
In the Grid Type box there are two options with radio buttons
True
True generates exact measurements. For example if you choose 4 grid blocks to the inch horizontally and 5 grid blocks to the inch vertically, your graph will print with 4 blocks per inch across the paper and 5 blocks per inch lenghtwise. A darkened line will mark each inch.
When you choose true, there will be two input boxes at the bottom of the screen. Input the number of horizonal grid blocks per inch and then the vertical grid blocks per inch.
Scaled
Scaled generates graph paper that is scaled to your specification.
Input both number of blocks per horizontal and vertical inch
Input the total number of horizontal and vertical blocks you wish to have printed on the page.