ctrl+shift+pon Windows or
cmd+shift+p). This will reset shortcuts, and other IDE settings, like IDE mode, to their default values. This will not reset your workspaces by default unless you also opt to "Reset your workspaces" from the prompt that will follow a successful "Reset your preferences" action.
cmd+shift+p). This will reset all the workspaces to their default values layout. This will not reset any shortcuts or other IDE settings.