It would be very useful to allow for item tag filtering for the Svg Graph widget. In one of my setups we have a lot of layers of information that can be presented in many aggregated or individual views.

In one case, we have a processing flow that contains many processes and those processes contain many threads. We monitor the CPU usage of specific threads to identify which host, flow, process and thread is the cause of backpressure. For these items we have really long names in this format:

CPU Usage - <flow> - <process> - <thread>

A name like the one above is very difficult to read and understand in the Svg Graph. It would be much better to be able to set the title of the graph widget with the values of <flow> <process> and <thread> and just have the name "CPU Usage" show up in the legend or hintbox along with the host. 

I have plenty of other examples, if you need them, but I think this is a necessary change for the Svg Graph widget as more visualization features are added to Zabbix in the upcoming 7.0 release.