All shortcut keys that used in salesforce developer console for fast coding, Like: Tab switching, move line up ad below, code commenting etc.
All shortcuts are listed in a dialog popup; It appears when you press
CTRL + SHIFT + ? or click
Shortcut Keys in developer console.
Note: It is recommended to use a Salesforce IDE instead as it retains history and has lot of extra features.
Right now VScode has best support for Salesforce development.
With latest release, it even supports normal salesforce org without use of DX: Develop Against Any Org in Visual Studio Code