This was functionality only available in vRA 7.4+ and I'm not sure it's possible in earlier versions.
Thanks I did not know that. I was planning to upgrade to vRA 7.5 anyway this summer.
If I upgrade can I then change already existing deployed VMs or will it only apply to new deployments processed by vRA 7.4+?
Also what is the procedure for doing the limit change on deployed VMs in the new version? I'm reading the docs now but it would be great if you could point me in the right direction.