Hey thanks! The Icons look great!
The upgrade and downgrade tool actually converts the object to another type. It is certainly possible to join and split a line by a series of combination of upgrades, downgrades, and convert to sketch, but it is a multiple step process. In architectural drafting, this join and splitting function is done hundreds of times a day, and so it is useful to have it in one tool.
This is the thread that started it:
https://forum.freecadweb.org/viewtopic. ... 9&start=20
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