I'd like to re-instate this request for the ability to highlight upstream/downstream transformer connections.
The previous Idea for this request has been closed as "released" but doesn't meet my use case requirements.
For large workspaces (where, arguably, this functionality is more useful), using the run from/to buttons to highlight connections is not practical as you need to zoom way out to see all the highlighted connections (thereby making it hard to see the individual transformers and to even click the run from/to buttons in some cases).
It would be nice to have a right-click option on transformers to make the highlighting "sticky" so that you can zoom/pan/etc. around the workspace and navigate the connections in detail.