Long writing sessions deserve an interface that does not fight your eyes. Rixoffice offers Light, Dark and System themes, and — unlike many office apps — dark mode is not a half-measure: it covers the whole workspace, canvas included. This page explains the three options, what the dark canvas actually changes and how theming interacts with your documents.
The three theme options
| Option | Behavior |
|---|---|
| Light | The classic bright workspace |
| Dark | Full dark interface, dark editor canvas included |
| System | Follows your OS appearance and switches automatically |
The choice lives in Settings, in the appearance section, and applies immediately across every app in the suite — RixDocs, RixSheets, RixSlides, the PDF Editor and Markdown Studio all switch together, in the same tabbed shell. There is no per-app theme to maintain: one setting, five editors.
The setting is per device, like the rest of appearance configuration. If you work on two machines, each remembers its own theme — dark on the laptop you use at night, light on the office desktop, with no syncing conflicts to think about.
Changing themes takes effect without closing or reloading anything. A document mid-edit stays exactly where it was; only the colors around it change. You can flip to dark to check how a long table reads in the evening, flip back to light, and never lose cursor position or scroll location in the process.
A dark canvas that means it
The detail that makes the difference in Rixoffice is the dark editor canvas. Many editors darken their chrome — menus, sidebars, toolbars — and leave you staring at a bright white page. Rixoffice darkens the page surface too, so a document at midnight is a comfortable dark sheet rather than a glowing rectangle in a dark room.
Practical notes:
- Text colors adapt so contrast stays readable on the dark canvas.
- Tables, charts and comments are styled for the dark surface.
- The theme is a viewing preference only — exports, prints and PDFs always use your document's real colors.
The dark canvas matters most for the apps where the page fills the screen: RixDocs and Markdown Studio. In RixSlides and the PDF Editor, the canvas darkening keeps slides and pages in context without a white ring of glare around them. For reviewers working through a long PDF at night, this is the difference between an hour of comfortable reading and an hour of squinting.
Contrast is handled with the same care as brightness. Light-on-dark is not an inversion of dark-on-light — text weights, selection highlights and comment markers are all tuned for the dark surface, so nothing looks washed out or vibrates against the background.
Colors in your content get similar treatment. A red revision mark or a green chart series keeps its meaning on the dark canvas; the theme adjusts the surroundings, not the semantics of your document's own colors.
Using System mode
System is the low-maintenance option. It reads your operating system's appearance setting and follows it:
- Set your OS to switch Light and Dark on a schedule (most systems support sunset-to-sunrise timing).
- Set Rixoffice to System.
- The workspace changes with your OS — dark evenings, light mornings — with no further attention from you.
If you have never scheduled a theme before, it is worth the two minutes: matching interface brightness to ambient light is one of those small comfort upgrades that compounds over months of daily use.
System mode also plays well with mixed habits. If you share a machine with someone who prefers the opposite theme, each person's OS account carries its own appearance setting, and Rixoffice follows whichever account is active — no in-app negotiation required.
What the theme changes and what it does not
- Changed: the whole interface — shell, tabs, ribbons, sidebars, dialogs, settings and the editor canvas.
- Not changed: your documents' actual formatting and colors on disk, print output, PDF exports or any file content.
This separation keeps theming safe: pick Dark for a night of edits, send the document to print, and the printout uses the real document colors, not your viewing preference. A document written entirely in dark mode is byte-for-byte identical to the same document written in light mode.
That guarantee extends to collaboration. A deck you finished at 2 a.m. in dark mode looks exactly the same to a colleague opening it in bright daylight — the theme travels nowhere, because it was never part of the file.
For contrast-sensitive users, theming is also an accessibility feature rather than a cosmetic one. Choosing the surface brightness that works for your eyes, and switching it as conditions change, is one of the cheapest ways to make long sessions sustainable.
A comfortable setup for long sessions
Three settings work well together:
- Dark or System for the theme, depending on how much you like the OS schedule.
- Language to your preference from the 19 available — see change the language.
- Keyboard shortcuts learned for the moves you make hourly, so eyes stay on content — see keyboard shortcuts.
What to explore next
- Interface overview — the workspace the theme applies to.
- Tabs and recent files — the launcher you will see in your new theme.
- Change the language — the other appearance-adjacent setting.