Reading and Listening

Open a document from the library to read it. The player bar at the bottom reads it aloud and highlights each sentence and word as it is spoken.

Playback

Press Play to start from the current position. OpenReader generates audio a little ahead of where you are listening and keeps it, so:

• the first sentence starts after a short preparation, then playback continues without waiting;
• the bar above the controls shows the whole document, with shaded bands where audio is already generated and can be played instantly;
• pausing, seeking, closing the document or reloading never throws away generated audio. Listening again, or exporting an audiobook, reuses it.

Drag the bar to jump anywhere. After a jump, Undo scrub returns you to where you were. Skip back and forward move one sentence.

While audio is being prepared, the player says so; it only shows as playing when you can hear it.

Voice

The Voice button in the player opens the voice panel for the current document:

• Pick a voice. Providers that support blending let you select several voices to mix them.
• Model speed changes how fast the voice itself speaks. It regenerates audio from your position.
• Preview selection plays a short sample before you apply it.

Changes in the voice panel apply to this book only. Use default returns the book to your default voice. Set the default voice, provider and model for all documents in Settings → Model & Voice.

Playback speed, the speed button next to the voice button, changes the playback rate instantly and never regenerates audio.

Reader settings

The settings button in the reader header opens Reader Settings:

Setting	What it does
Language	The language the document is read in. Automatic uses the document's metadata or detected language. The available languages depend on the voice and provider.
Show the pages / Show the book	PDF and EPUB only. Turn off to read the text as flowing sentences. PDFs can show a single page, two pages or continuous scroll. EPUBs can use the app theme.
Highlight sentence / Highlight words	Turn highlighting of the spoken sentence and word on or off.
Max segment length	How much text is generated as one piece of audio.
Keyboard shortcuts	Turns the playback keys on or off.
PDF Layout	PDF only. Shows the detected blocks over the page, re-runs layout analysis, and chooses which block types (headers, footers, footnotes, titles and more) to skip when reading aloud.

Changing the language, segment length or skipped PDF blocks changes what is spoken. OpenReader asks before applying the change, then regenerates audio from your position.

Contents and bookmarks

• Contents in the reader header lists the chapters or pages. Choose one to go there, or use Find in book to search the text and jump to a match.
• ⋯ → Save bookmark bookmarks the current sentence. Bookmarks lists your bookmarks so you can jump back, rename or delete them.

Your reading position, bookmarks and settings are saved to your account and follow you to other devices.