If a quantity is known during the period of communication and the summary size of those transferred and taken is file, then special graphic element is used for the indication of progress. It is located in the window of the messaging system, and has the form of the diagram, which depicts the percentage of transmitted or taken data and their summary size.
With the transfer is file the indicator it is present practically always, then with the method - only if the remote system previously reported volume transmitted data.
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