Gestures

Rotary Knob — Modes and Settings

The rotary knob in Flight Deck ONE is a touch-optimized control that drives X-Plane commands and datarefs. It supports different gesture modes, dual-knob behavior, push/pull actions, and tuning options so you can adapt it to your flying style and hardware.


Gesture Modes

Gesture modes control how your finger movement is translated into + (increase) and (decrease) steps. You can choose between four modes: Natural, Two-Axis, Vertical-Only, and Horizontal-Only.

Natural (Quadrant Mode)

In Natural mode, the knob interprets your drag direction based on the quadrant where the drag starts, mimicking how a real knob looks when turned from different sides:

  • Left side (vertical area): drag up to increment
  • Right side (vertical area): drag down to decrement
  • Top side (horizontal area): drag right to increment
  • Bottom side (horizontal area): drag left to decrement

The (decrease) direction is always the opposite of the arrows above. This creates a very intuitive feeling: you are effectively “turning” the knob clockwise or counterclockwise depending on where you grab it.

Natural (Quadrant) mode

Best for: users who want a realistic, knob-like behavior.

Two-Axis (Dominant Axis)

In Two-Axis mode, both vertical and horizontal drags are supported. The knob automatically chooses the dominant axis of your drag:

  • Drag upincrement
  • Drag downdecrement
  • Drag rightincrement
  • Drag leftdecrement

If you drag diagonally, the knob locks onto the axis that dominates your movement. This prevents jitter between vertical and horizontal directions.

Two-Axis mode

Best for: fast, forgiving adjustments anywhere on the knob surface.

Vertical-Only

In Vertical-Only mode, only the up/down drag direction is used:

  • Drag upincrement
  • Drag downdecrement
Vertical-Only mode

Best for: tight vertical layouts or when horizontal drags tend to clash with nearby controls.

Horizontal-Only

In Horizontal-Only mode, only the left/right drag direction is used:

  • Drag rightincrement
  • Drag leftdecrement
Horizontal-Only mode

Best for: rows of knobs or narrow panels where vertical motion is constrained.


Knob Types

Depending on the avionics system, a rotary control in Flight Deck ONE can be configured as:

  • Single knob — one rotation channel (clockwise / counterclockwise), mapped to a pair of commands or a dataref increment/decrement.
  • Dual knob — inner and outer knob, each with its own commands (for example: MHz / kHz, or hundreds / thousands of feet).
  • Push-pull knob — rotation plus separate Push and Pull actions, typically mapped to mode changes or engagement / disengagement commands.

The available options may vary by module and by aircraft.


Drag Area Mode

Use Drag Area Mode to decide how a double rotary (outer + inner knob) selects which knob your drag will control.

Natural

  • The control behaves like a physical double knob.
  • Knob selection is determined by where you drag relative to the rings and the current gesture mode.
  • Recommended if you prefer the classic, ring-based interaction.

Split

  • The drag area is divided into two halves so you can target a knob by where you start your drag.
  • Which half selects which knob depends on the Gesture Mode:
    • Vertical Only
      left half = outer, right half = inner
    • Horizontal Only
      upper half = outer, lower half = inner
    • Two Axis
      the app detects your dominant drag direction, then applies the corresponding split:
      • Vertical drag:
        left = outer, right = inner
      • Horizontal drag:
        upper = outer, lower = inner

Note: Split is available when Gesture Mode is Two Axis, Horizontal Only, or Vertical Only. In Natural mode, Drag Area Mode is always Natural.


Dual-Knob Smart Mode

Dual knobs are common on radios and autopilots (for example, to control both coarse and fine increments). Smart Mode is an assist feature that makes switching between the inner and outer knob faster on a touch screen.

This allows you to quickly adjust both parts of a value (like MHz and kHz, or large and small increments) without needing to precisely target the inner versus outer area each time.

1 Standard

Smart Mode uses two timing thresholds:

  • Lower threshold → minimum delay required before a retouch can trigger a knob swap
  • Upper threshold → maximum delay allowed for a retouch to still count as a swap

How it behaves

  1. You perform your first drag (inner or outer knob).
  2. If you release and retouch again after the lower threshold but before the upper threshold,→ Smart Mode swaps to the other knob.
  3. If you retouch too early (before the lower threshold), nothing happens — you stay on the same knob.
  4. If you retouch too late (after the upper threshold), Smart Mode expires and the next drag does not swap.

Example

Change MHz → then change kHz
  1. Turn the big knob to set MHz (118 → 119).
  2. Lift your finger.
  3. Touch the knob again after a natural short pause.
  4. Now the small knob is active → adjust kHz (119.00 → 119.05 → 119.10).
Change kHz → then go back to MHz
  1. Adjust kHz.
  2. Lift your finger.
  3. Touch again after a small pause.
  4. You’re back on the big knob → adjust MHz again.

That’s it. Each pause switches to the other knob.

2) Retouch-Only

When the lower threshold is set to the minimum allowed value, Smart Mode switches to a different mode:

How it behaves

  1. You perform your first drag on a knob.
  2. If you retouch quickly (within the upper threshold),→ Smart Mode immediately swaps to the other knob.
  3. After this retouch, Smart Mode stops trying to maintain a dual-window behavior and falls back to a simple cycle:
    • Retouch rapidly → swap
    • Wait longer than the upper threshold → Smart Mode expires (similar to Smart Mode OFF)

Example

Change MHz → then change kHz
  1. Turn the big knob (MHz).
  2. Lift your finger and tap again quickly.
  3. Now the small knob is active → adjust kHz.
Change kHz → back to MHz
  1. Adjust kHz.
  2. Lift your finger and tap quickly again.
  3. You’re back on the big knob → adjust MHz.

This version is basically: turn → quick tap → turn → quick tap → turn → quick tap.



Advanced Settings

In the module settings for each rotary knob, you may find additional options:

  • Gesture Mode — choose between Natural, Two-Axis, Vertical-Only, and Horizontal-Only.
  • Smart Mode (for dual knobs) — enable or disable automatic inner/outer switching and allows you to set the thresholds timing.
  • Sensitivity — adjusts how many steps are generated for a given drag distance or angle.
  • Acceleration (if available) — increases step size when you move faster, useful for large changes.
  • Step size / granularity — where supported by the module, choose between fine and coarse steps (for example, 100 ft vs 1000 ft).
  • Invert direction — reverses the mapping so that the effective + / directions follow your personal preference or match a specific aircraft.

Troubleshooting

  • The knob feels backwards: turn on Invert direction in the knob settings.
  • Diagonal drags behave strangely: try Vertical-Only or Horizontal-Only, or use Natural mode for more quadrant-based behavior.
  • Inner/outer knob is hard to hit: enable Smart Mode so you can alternate drags instead of aiming precisely.
  • Changes are too slow or too fast: adjust the Sensitivity.

With the right combination of gesture mode, sensitivity, and Smart Mode, the rotary knob can closely match the way you prefer to interact with avionics, while staying efficient on a touchscreen.