How to see the master which-key menu?

[mairs8]

As you type in neovim, which-key will show you the available keymappings for that key-bind. For example, if i press space it will show me the below.

I noticed that once i press space, i can then press the back button to see the master which-key menu, pictured below. I want to know if there is a single key i can press to see this master which-key menu . i.e. without having to press 'space' and then the 'back' button. I know you can see it with command ':whichKey' but i would like to know if there is a predefined keybind for it? I am hoping this keybind exists as default rather than having to manually map a random key to ':WhichKey' command.