The idea behind KB was to provide the 20% of tools used 80% of the time in the most out-of-the-way GUI possible. Its features are very similar to that of Krita's own Pop-Up Palette, but tries to be ...
You can also use geometry tools to erase points by pressing Eor erasing button. Once done, split the layer to Layer ‣ Split ‣ Split Layer. Here, Krita offers a number of options, but just do as the ...