Field getCurrentField() {
			if (currentField == null) {
				AnchoredLayout layout = findLayoutOnScreen(cursorPosition.getIndex());
				if (layout != null) {
					currentField = layout.getField(cursorPosition.getFieldNum());
				}
			}

			return currentField;
		}
Checks if the "control" modifier is on and the "shift" modifier is not.
Ghidra/Framework/Docking/src/main/java/docking/widgets/fieldpanel/FieldPanel.java