Meta
Show the “keyboard shortcuts reference” document: “⌘K ⌘R”.
Show all commands: “⇧⌘P”.
Go to file: “⌘P”.
Start debugging: “F5”.
Show integrated terminal: “⌃`“.
Create new terminal: “⌃⇧`“.
Editing
Select text from the current cursor: “⇧↑ ⇧↓ ⇧← ⇧→”.
Batch replace(multi-cursor editing): select a string instance and press “⇧⌘L”, which will add a selection at each occurrence of the current selected text. Now you can replace all instances by simply typing.
Multiline selection: “⌥⌘↑” and “⌥⌘↓”.
Move a line upper/lower: “⌥↑” and “⌥↓”.
Column (box) selection: “⌘ + mouse selection”, or “⇧⌘ + mouse selection”.
Search
Search in file: “⌘F”.
Search globally: “⇧⌘F”.
Formatting
Format Document: “⇧⌥F”.
Format Selection “⌘K + ⌘F”