How to merge multiple rows or columns in a panel schedule template

[Anonymous]

Is there any way to merge multiple columns and rows in a Panel schedule template. Here's a customized template that I'm trying to create for Panel Schedule. Its design is slightly complicated, I would need the ability to merge column, row and probably cell

In the above image, there are two arrows, the first arrow is pointed towards 'Connected Load' where I think I'd either need to merge column or split multiple columns from a single column. And another arrow is pointed towards 'Ratings of Incommers' where I believe I would need to merge rows. 

I'm not sure what would be the best way to achieve the above format for the panel schedule template, I would really appreciate if someone could provide any help. Thank you

[Avaris.]

You can group header rows, select all cells that are involved and choose for 'group'.

Unfortunately, the rest of your scheme cannot be replicated in native Revit.