If I'm 3 or 4 (or 30 or 40) proposals into a project and I decide to add something to the base, I need to add it to all proposals (or perhaps three fourths of them). This is time consuming and brain numbing and should be automated. In the right click menu, there should be an option to "Copy to proposal". This would then bring up a list of your proposals and you can select which ones the object(s) would be copied to.