I am a new QGIS user. I come from an Arcgis background, but in my current work for a public administration I must use QGIS for interoperability.
As an ArcMap user, I am used to certain "comforts", such as the automatic legend refresh, but also to the ability to personalize which elements to show and which not.
Here in QGIS I wasn't able to find a way to have the legend updated without adding again all the layers that where previously purged.
I need it because I'm trying to have a specific value to be showed in my Map/print layout, and I need that number (which is an area) to change every time I want to represent a new zone. What I need is a sort of automated layout in which quantities change accordingly to the area I select. Since I knew i could do this with ArcMap, I was sure to do the same in QGIS.
Is there a way to obtain this?