Are there any extensions or plugins to allow a user to right click a SAP Dashboards table (there are a variety of tabular data components, I'm not sure which is best) and then export or copy to clipboard the contents? This would be extremely useful. If it's possible please let me know. Thanks
Its not possible right now, all you can do that to go with custom components which is an add on. Check out the below link on this. Hope these add on are paid one.
Else you can create a webi document which is similar to your spreadsheet or table data and you can use the opendoc link to open the data in a different page or in excel.'
Hope this helps!!!