First, Flow use source and target to adapt objects from source to target.
Those Source and target can be both curves or both surfaces.

Documentation for Flow is here
http://moi3d.com/4.0/docs/moi_command_reference8.htm#flow

Documentation for Iso
http://moi3d.com/4.0/docs/moi_command_reference7.htm#isocurve

You have to turn your drop to avoid problems with cutting an edge next.



Use ISO curve -----> Construct/Curve/ISO



When you have your curves, you can select drop + Curves and Trim it -----> Edit/Trim




Now you have a surface which could be a target surface.

Construct a rectangle on your Text which could be a source surface.




You can now use the Flow function -----> Transform/DEform/Flow




If you want delete the cutting of your drop, select text on drop Copy it with Ctrl/C

press Undo many time to return on the situation you want then Paste iwith Ctrl/V