I am having problems with the knife tool working properly. I select the outline where I want to start to cut and take the knife tool to where I want to end the cut and click and there is a visible line where the cut is going to be made but then when I tab once or twice it does nothing. Is this a software problem? I have reset the program holding the F8 key and it still doesn't work. Help please!
Try this: Hold SHIFT and then use the knife tool to draw "Besier" curve for cut.
Maybe you have some setting on mouse in your OS. BTW which OS and Corel version are you using?