Deleting in tables

[thomas sch�nhoff]

Hi,
I intend to delete some unnecessary lines in a
table (within a float) afterwards. Till now I
tried to do this by pressing crtl./backspace and
some other combinations without success. 
Does someone know how to manage this, I didn't
find a hint in the docs !?

                        Regards Thomas

BTW, I'm running Lyx1.1.5pre3