Step #1: Go to the first page.

Upon opening the collection you have created, you will be redirected to the default page which is the first page.

In the image shown below, the chosen collection is the “Default Collection.” This is what the first page looks like:

Step #2: Adding a template.

For this demonstration, I went ahead and added the first template among the “Subtraction” templates.  This is what the first page looks like after:

I also changed the minimum and maximum values of the First and Second operand range to “10” and “99” respectively.

Afterward, click on the “Update Worksheet” button.

This is what the worksheet looks like after:

I increased the “Grid item width.” 

Afterward, click on the “Alignment” option in the context menu.

Now, click on the “Fit to row” option.

This is what the worksheet looks like after:

This is already embedded in the application so as seen in the worksheet, you will notice that some problems have no regrouping involved. Furthermore, other problems have regrouping involved.