Reading PDFs
riida’s PDF viewer is built on PDF.js and supports text selection, links, full-text search, and automatic reading position saving.
Basic Navigation
Page Controls
| Action | Method |
|---|---|
| Next page | → / PageDown / scroll |
| Previous page | ← / PageUp |
| Go to page | Type in the page number field in the toolbar |
| First page | Home |
| Last page | End |
Back / Forward
Use the ← / → buttons in the toolbar, or ⌘[ / ⌘] (macOS) to navigate your history.
Text Selection
On PDFs with a text layer, drag to select text and copy it. Scanned PDFs without a text layer do not support text selection.
In-Document Search
Click the search icon in the toolbar (or press ⌘F) to open the search bar. Matches are highlighted in the document.
Reading Position
When you close the viewer or switch to another book, your current page and scroll position are saved automatically. The next time you open the file, reading resumes from where you left off.
Spread Layout
Change the page layout from viewer settings:
- Single page: one page at a time
- Spread (left-to-right): for Western books
- Spread (right-to-left): for Japanese books
- Auto-detect: inferred from the PDF content (default)
Japanese vertical-text PDFs are detected and displayed right-to-left automatically.
Viewer Settings
Click the settings icon in the toolbar to adjust display options. Settings have two scopes:
- Global: defaults for all books
- This file: overrides for the current book only
Notes
Click the note icon in the toolbar while a PDF is open to open the floating note panel. Notes are autosaved.