FBD comments
Comment text area can be entered anywhere in an FBD
"Function block diagram"
A function block diagram describes a function between input variables and output variables. A function is described as a set of elementary blocks diagram.
Press the following button 
in the FBD toolbar to insert a new comment area.
In this mode, the mouse is used to insert comment text areas anywhere in the diagram.
Double-click on the comments area to enter or change the attached text. When selected, comment texts can be resized.
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You can insert hyperlink on external files as shown below. Only TXT and BMP extensions are allowed. When the link is valid, the hyperlink is replaced with the file's content.
