Cannot create a custom palette in Painter 2020

I know how to create a custom palette but cannot add any tool to it.  My Knowledge doc claims that you select the tool and it will appear in the palette.  I cannot get this to work for me.  I have also read that holding the Shift key and dragging the tool to the palette works for adding a new tool.  This does not work either.  No doubt I'm doing something incorrectly.

Any help will be greatly appreciated.

Thanks