This is just a simple but helpful function I found after about 2 years of using Node-Red to organize the many somehow sorted flows a bit more.
NR supports grouping of Nodes, so they can be arranged and named as one single Group!!
This can be done by
selecting the nodes -> go to menu -> Groups -> Group selection
or
pressing Ctrl + Shift + G after selecting them.
You can then name and color them as you like and even copy/paste the style of one with
Ctrl + Shift + C/V
More details are described here:
https://nodered.org/docs/user-guide/editor/workspace/groups