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Keyboard Shortcuts

ncsim-viz supports keyboard shortcuts for efficient navigation and playback control. Press ? at any time to display the shortcut overlay within the application.

Full Reference

Key Action
Space Play / Pause simulation
Left Step backward one event
Right Step forward one event
Shift+Left Jump backward 10% of the makespan
Shift+Right Jump forward 10% of the makespan
Home Jump to the start of the simulation (time 0)
End Jump to the end of the simulation (makespan)
+ Increase playback speed one step
- Decrease playback speed one step
1 Switch to the Overview tab
2 Switch to the Network tab
3 Switch to the DAG tab
4 Switch to the Schedule tab
5 Switch to the Simulation tab
6 Switch to the Parameters tab
D Toggle dark / light theme
? Show / hide keyboard shortcuts overlay

Playback Speed Levels

The + and - keys cycle through the following speed values:

Level Speed
1 0.25x
2 0.5x
3 1x (default)
4 2x
5 5x
6 10x

You can also click the speed buttons in the transport bar on the Simulation tab to jump directly to any speed level.

Scope and Behavior

Shortcuts work on all tabs

Tab switching (1 through 6) and the theme toggle (D) work from any visualization tab, not just the Simulation tab. Playback controls (Space, arrow keys, Home/End, +/-) are active whenever the Simulation tab's playback engine is loaded.

Text input fields

Keyboard shortcuts are automatically disabled when focus is inside a text input field or text area, so you can type normally in the Configure & Run form without triggering shortcuts.

Shortcut Overlay

Press ? to open the shortcuts overlay. The overlay displays all shortcuts in a modal dialog. Press ? again or click outside the modal to dismiss it. You can also open the overlay by clicking the keyboard icon in the header toolbar.