Hotkeys

Editor Area Screen

Editor, Tree

Ctrl*+A - select a parent view
Delete / Backspace - delete the selected view

Overall

Ctrl+D - duplicate a design
Ctrl+R - rename a design
Ctrl+O - open design preview
Ctrl+Z - undo
Ctrl+Shift+Z / Ctrl+Y - redo

Designs Screen

Ctrl+D - duplicate a project
Ctrl+R - rename a project

Data sources / Stylesheet

ctrl+S - save the code
ctrl+R - rename a data source
ctrl+D - duplicate a data source

* Use Command for MacOS.