in view 3: All ERs (development branch ) colour is used to distinguish the different types of atomic ER while in view 4: requirements icons are used for the same purposes. View 4 also uses colour when an icon is hovered/ selected (currently based on the type). The main disadvantage of using icons is the increased stabilization time and amount of iteration it takes for this purpose (not display time).
in view 3: All ERs (development branch ) colour is used to distinguish the different types of atomic ER while in view 4: requirements icons are used for the same purposes. View 4 also uses colour when an icon is hovered/ selected (currently based on the type). The main disadvantage of using icons is the increased stabilization time and amount of iteration it takes for this purpose (not display time).