The Style section controls how Simple UI looks: system and action icons, icon packs and icon presets, the interface font, global text size, and the style of progress bars on the Home Screen.
To open it: Simple UI Settings → Style.
Wallpaper, bar layout, and Home Screen modules live under Home Screen (and related sections), not under Style. For wallpapers see Customising Home Screen Wallpapers; for icons in depth see *Customising Icons.*
Everything under Style → Icons changes which images (or Nerd Font glyphs) appear on chrome and shortcuts. A pencil mark (✎) on a submenu title means at least one custom override is active in that group.
Style → Icons → System Icons
Overrides fixed UI icons used across Simple UI and native KOReader. Each slot can be set to a custom SVG/PNG, left at the default, or reset.
Groups of slots include:
| Group | Examples of what you can change |
|---|---|
| Titlebar | Menu, Search, Back |
| Browse buttons | Default / Author / Series / Tags mode icons on the library titlebar |
| Pagination | First / Previous / Next / Last chevrons on native menu pagination |
| Navpager | Previous / Next on the bottom navpager |
| Collections | Back button on Collections / collection lists |
| Quick Action defaults | Fallback icons for folder-, plugin-, system-, and group-type actions |
| Folder Covers | Empty-folder icon |
| Touch menu tabs | Menu, Settings, Tools, Search, File browser settings, Reader navigation, Typeset, Back to file browser, SimpleUI Quick Settings tab |
Reset All System Icons clears every system-slot override at once.
Pick files from koreader/settings/simpleui/sui_icons/ or Browse… anywhere on the device. Details and filename tokens for packs: *Customizing Icons and Icon Packs.*
Style → Icons → Quick Actions Icons
Sets icons for built-in and custom Quick Actions (navbar / QA rows / action lists), independently of the system slots above.
For each action you can typically: