You can generate a DFD by entering text in the above box. The text has to be formatted this way:
XN data
The X is a letter. Use a T for a terminator, D for datastore, or P for process.
The N is a number. Simply increment, starting at 1.
The data can be whatever you like.

For connections, use this formatting:
XN-XN label
The XNs are referrers to identifiers (e.g. D1), and label is what name the information has.

Example