I'm new to QGIS and have recently been testing the software as my org plan to migrate from ArcGIS to QGIS in the near future. I often use the 'Add values', 'Remove values' and the group values feature in ArcGIS (Symobology¬ Categories¬ Unique Values) to display Symbology for selected values. Is it possible to do this in QGIS? With categorized selected in the style menu the only options I can see is to add or delete. Any assistance would be greatly appreciated!