Custom palette - cannot add custom time signature
I discovered (Ok, was informed) that it is possible to create a custom workspace and then edit existing palettes.
So, I created a new workspace based on the advanced workspace.
I then opened the time signature palette.
I clicked on a time signature in my score - 3/2 - and tried to drag it onto the palette => didn't work.
Read better the instructions, held down Ctrl + Shift and tried to drag it onto the palette => still didn't work.
Even tried variations, releasing the mouse first and then the keys, first the keys and then the mouse, all together => nope, didn't work.
Is this a bug or by design ?