RFE # 1690178. Make a copy of the selected annotation when holding the Option key while selecting an annotation for dragging. 
RFE # 1690178. Make a copy of the selected annotation when holding the Option key while selecting an annotation for dragging. 
ycaihua/skim-app,WoLpH/skim,WoLpH/skim,ycaihua/skim-app,WoLpH/skim,ycaihua/skim-app,WoLpH/skim,WoLpH/skim,ycaihua/skim-app,ycaihua/skim-app