"When you first fire up Dia you might be reminded a bit of the
multi-window'd interface in The GIMP (see Figure 1). You do not
have to start a new file, as Dia will start up in a new file
window. You can simply begin creating your flowchart.
"Just for kicks I want to illustrate how to create one of my
favorite flow charts. The flow chart in question is from TV's
Sheldon Cooper (The Big Bang Theory). In one episode he created a
Friendship Flowchart established and illustrated the algorithm for
making new friends beginning with the pre-defined process of
placing a phone call (see Figure 2)."