These are default assignments. Settings → Keyboard Shortcuts can change or remove any of the 27 assignments; menus show current bindings. Letter actions use physical keys and do not depend on keyboard layout.
**Files**
Ctrl+N – new • Ctrl+O – open .580 • Ctrl+S – save • Ctrl+Shift+S – save as • Ctrl+I – import • Ctrl+E – export
**Execution**
Ctrl+R – run/pause • Ctrl+T – step instruction • Ctrl+Y – step T-state • Ctrl+Shift+R – clear RAM • Ctrl+Shift+G – reset processor • Ctrl+Shift+H – clear HLT
**Windows**
Ctrl+H or F1 – Help • Ctrl+, – Settings • Ctrl+M – monitor • Ctrl+F – floppy • Ctrl+D – HDD • Ctrl+A – network • Ctrl+P – printer • Ctrl+Shift+C – stack area
**Editing and memory**
Ctrl+Z – undo • Ctrl+Shift+Z – redo • E – opcode picker • Alt+Enter – selected-cell action • Alt+Shift+Enter – return to operand • Alt+Q – 0000h • Alt+E – FFFFh
Ctrl+A remains Select All inside a focused input, so the network shortcut runs only when an input does not consume it. Esc closes the active dialog, menu, or device window.