Hi Tristany,
Currently, the programmatic table formating options are limited for the PowerPoint API and the team is working to introduce these options in the future releases.
For your use case, you can alternatively use the StyleName property of the Table to get the desired output.
To get the list of valid table style names in a presentation, you can use mlreportgen.ppt.Presentation.getTableStyleNames.
As an example, to just add borders to your table, you can use 'No Style, Table Grid' style name as:
paramTable = Table();
paramTable.StyleName = 'No Style, Table Grid';
Thanks,
Rahul