Shortcuts are the combinations of keys being used to perform a set of activities. You can find the list of PyCharm shortcuts in Keymaps guide reference.
The list of shortcuts is available in the following option Help -> Find Action menu where it pops up with a shortcut window.
You can see the shortcut window as shown here −
The shortcut includes a list of Identifiers, shortcuts with functions and option menu bar.For example, View Navigation Bar includes toggle ON and OFF which displays the navigation bar as per the value set (ON and OFF).