Would you like to change the appearance of different types of nodes (Cusp, Smooth Symmetrical) to better tell them apart?
Copy the text below into Notepad, then save it  as a text file. Rename the file from a .txt extension to .reg.
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Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Corel\CorelDRAW\15.0\Draw\Application Preferences\Node Edit Tool]
"NodeColorCoding"="1"
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With CorelDRAW closed down, double clicking on the file that you just created will allow you to make a change to the registery  that will then allow you to see the various types of nodes (cusp, smooth and symmetrical) and have them color coded.

Tip provided by Roger Wambolt, CorelDRAW team.