The Form's source is here .

How to import Form into the system see here . 

Create and save a new form

Launch an XLSX Workbench, and create a new form with name ROWSPAN .

Assign a context to the form 

Assign a context ZCONTEXT_SUBTOTALS to the form. When an automatically creation of the Form structure will be prompted, you should press the button

to create a structure manually.

Markup of template 

Markup an Excel-template as shown below :

 Create a Form structure

Add the new components into form structure as shown in the picture below:

Context binding for components

Perform Context binding for «Loopsteps» and «Values» according to scheme below:

Activate the Form by pressing a button 

Explanations

A «Resizable pattern» component is a kind of form component «Pattern». Its feature that it is stretchable via merging of cells in proportion to its subordinated areas.

Properies tab of the «Resizable pattern». Pay your attention to option «Merge cells»: