I have recently started working in QGIS. I need to select multiple features loaded in map canvas one by one. To select a feature in addition to the selected features in the map canvas, I need to hold the 'CTRL' key. Is there settings options available in QGIS so that I can configure the 'Add to current selection' without holding the 'CTRL' key?
I don't think there is a setting to keep adding features to a selection without holding a modifier key.
That said, in 2.18, holding Shift adds features, while Ctrl removes features for me.