I have just upgraded to 6.7 U3 and still can't do this. I'm having to use the "flex" client, which now shows as "deprecated.
There is a VMware KB that suggests you can filter by tags in the HTML5 client, but I can't see how it is possible: Quick Filters Available for vSphere Objects
Edit that: Looking at my own screenshot, VMware refer to the "Flex" client as the "Web Client" so the information in the KB link above is correct, quick filters for tags are available in the "Web Client" or "Flex Client", but not in the HTML5 client.
I'm having the same problem.
As per documentation
it seem like quick filters should be available in 6.7, as should a menu called "Layout Settings"
I have neither of those. (But I can move panes.... )
We're running 6.7.0, build 14320388 (u3) on the hosts, 6.7.0, build 14368073 on the VCSA.