highlight related fields

Hi Ruben! Thanks for reaching out. I'm not sure I completely understand what you are trying to do but there is a way to do conditional formatting within Lucidchart. If you take a look at this article it goes through how you can assign colors based on shape or text. If I misunderstood please let me know hope this helps!

If I select title I want all the linked attributes to be highlighted (in this case From Block)

This isn't a feature that Lucidchart has at this time. But if you would like it to be potentially added in the future you can fill out this feature request form to bring the idea to the attention of our product team. Thanks for your request!