Controls

The Controls menu lets you customize front buttons, side buttons, and reader shortcuts.

Power Button

Single-press action
Double-press action
Triple-press action
Long-press action

Defaults:

Single press: Ignore
Double press: Refresh Screen
Triple press: Toggle Bookmark
Long press: Sleep

Front Buttons

Remap front buttons
Remap front buttons while reading
Orientation aware
Long-press behavior (in-reader only)
Long-press back action (in-reader only)
Long-press menu action (in-reader only)

Note: Even though some actions assigned to the front buttons could be used globally, they are restricted to apply within the reader only due to the dynamic nature of the front buttons (they can mean different things based on the screen you’re on).

Side Buttons

Layout
Orientation aware
Long-press action

Side Button Long-press Action

While reading an EPUB, set this to Change Font Size and hold a side button for about 1 second:

Up increases font size
Down decreases font size

Set this to Orientation Change and hold a side button for about 1 second:

Up cycles through the orientations in the following order: Landscape CCW -> Inverted -> Landscape CW -> Portrait
Down cycles through the orientations in the following order: Landscape CW -> Inverted -> Landscape CCW -> Portrait

The firmware recognizes these reader long presses after 700 ms. EPUB text reflows after a font-size or orientation change. TXT supports the orientation action; fixed-page XTC books do not reflow and consume the side-button orientation hold without rotating the page.

Defaults:

Single-press Power Button Action: Ignore
Double-press Power Button Action: Refresh Screen
Triple-press Power Button Action: Toggle Bookmark
Long-press Power Button Action: Sleep
Long-press Back Button Action: Browse Files
Long Press Menu Button Action: Ignore

Available actions include:

Ignore
Sleep
Page Turn
Refresh Screen
Change Font
Guide Dots
Bionic Reading
Toggle Bookmark
Sync Progress
Mark as Finished
Reading Stats
Take Screenshot
Auto Page Turn Interval
File Transfer
Calibre Wireless
Join a Network
Create Hotspot
Tilt Page Turn (X3 only)
Footnotes
Dark Mode
Browse Files
Save Clipping

On X3, Tilt Page Turn is also offered when the sensor is available. Some actions only do useful work while a supported book is open.

Locked Sleep-Image Cycling

The awake Power actions above are separate from Settings -> Display -> Tap Power While Asleep to Cycle. CrumBLE introduced this as an opt-in one-tap action: a brief Power tap selected another sleep image and returned the device to deep sleep instead of waking it. Duet expands that behavior to Off, 1, 2, or 3 brief clicks and defaults to 3 at Lauren’s direction because one tap made accidental image changes too easy.

The setting is labeled 3 clicks, and Duet’s code intends to count the press that starts the sleeping device’s wake path as click one. Current physical testing has nevertheless found that the reliable default gesture can feel like four physical presses: one initial press to enter the wake-detection path, followed by the three deliberate taps. This is a known alpha input quirk rather than a fourth selectable setting. A deliberate hold continues into a normal wake.

Footnote Shortcut

When a shortcut is mapped to Footnotes, the shortcut opens the footnotes submenu while reading. If the current page has only one footnote, Duet opens that referenced page directly.

The Quick-return from Footnotes setting controls whether the Power button acts like Back after opening a footnote page, making it faster to return to the original reading position.