Extract original document from manued document. Searching the fixed point. Easy to input for manued command. Redefine the manued symbols. Motivation of implementing manued.
Email is a very convenient communication method.
Because Email is mail, it is not interrupt other people's work like telephone does. Moreover, it is high-speed and there is not so long time lag, it always takes only a few seconds or several minutes until reach to a recipient. So, since this feature, many people use this system. The author needs to exchange a manuscript with collaborators or editors via Email. However, in the proofreading point of view, Email has some weak points.