Night Mode

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In some lighting conditions, “night mode” (white text on dark grey) is easier to read or at least to give your eyes a needed break for a few minutes. Logos (prior to Logos 9) does not have a native “night mode,” but you can enable one for your operating system.

All

F.lux is available for Windows, OS X, iOS, Linux, and Android. It also has a Darkroom color effect with black background and red foreground.

Windows

Use the Magnifier feature:

Enable “Aero” in Vista & 7.
Open Control Panel, click Ease of Access, and click Magnifier.
- Alternatively, you can start typing “Magnifier” in the Search box of the Start Menu and then click Magnifier.
By default, Magnifier should open with a zoom of 200x. A small Magnifier control window will open, as well.
- If only a magnifying glass appears on your screen, click the lens to expand it to the Magnifier control window.
- If nothing appears, click the new Magnifier button on your taskbar (it looks like a computer screen with a magnifying glass) to show the control window.
Press the large MINUS on the Magnifier control window to reduce the zoom to 100% (assuming you do not want any level of zoom).
Click the gear icon on the control window to open Magnifier Options.
Check “Turn on color inversion” in Magnifier Options and click OK.
Minimize Magnifier (you might have to click the magnifying glass to get the control window again).
To make a permanent “Night Mode” button on your taskbar:
1. Right-click the Magnifier button on the taskbar (it looks like a computer screen with a magnifying glass).
2. In the menu that appears, click “Pin this program to taskbar.”
3. Drag it to move it wherever you would like it.

You now have a Night Mode button on your taskbar. There are several ways to return to regular mode. The easiest:
1. Right-click the Magnifier button on your taskbar.
2. Click “Close Window” in the menu that appears.

Magnifier has these keyboard shortcuts:
- Ctrl+Alt+I - Invert colors
- Windows logo key + Esc - Exit Magnifier

There are several alternatives to Magnifier:-

Enable High Contrast via Ease of Access
Change Resource Panel Background in Logos via Tools > Program Settings.
Use Night Light in Windows 10.
Free Negative Screen utility has customisable settings in negativescreen.conf e.g.
- add Negative Green with +alt+F12
  Negative Green=win+alt+F12
  { 0.0, -0.12, 0.0, 0.0, 0.0 }
  { 0.0, -0.32, 0.0, 0.0, 0.0 }
  { 0.0, -0.64, 0.0, 0.0, 0.0 }
  { 0.0, 0.0, 0.0, 1.0, 0.0 }
  { 0.0, 1.0, 0.0, 0.0, 1.0 }
- Forum thread Sepia Background capability has screen shots showing Light Sepia and Light Yellow overcasts.
  - # Light Sepia overcast=win+alt+F12
    # “Normal Color” alternative with Green and Blue color intensity reduction (reduce Blue twice as much as Green)
    { 1, 0, 0, 0, 0 }
    { 0, 0.92, 0, 0, 0 }
    { 0, 0, 0.84, 0, 0 }
    { 0, 0, 0, 1, 0 }
    { 0, 0, 0, 0, 1 }
  - # Light Yellow overcast=win+alt+F12
    # “Normal Color” alternative with Blue color intensity reduction
    { 1, 0, 0, 0, 0 }
    { 0, 1, 0, 0, 0 }
    { 0, 0, 0.84, 0, 0 }
    { 0, 0, 0, 1, 0 }
    { 0, 0, 0, 0, 1 }
- Forum thread Suggestion: Better resolution and control over screen includes screen shots showing Smart Inversion and Negative Candle
  - # Negative Candle has Gold text with Red Scroll
    Negative Candle=win+alt+F12
    { -0.3, -0.5, 0.0, 0.0, 0.0 }
    { -0.6, -0.3, 0.0, 0.0, 0.0 }
    { -0.1, -0.5, 0.0, 0.0, 0.0 }
    { 0.0, 0.0, 0.0, 1.0, 0.0 }
    { 1.0, 1.0, 0.0, 0.0, 1.0 }
  - # Alternate for Smart Inversion Alt 1 with bit less color saturation
    { 0.8, -0.9, -0.9, 0, 0 }
    { -0.9, 0.8, -0.9, 0, 0 }
    { -0.9, -0.9, 0.8, 0, 0 }
    { 0.0, 0.0, 0.0, 1, 0 }
    { 1.0, 1.0, 1.0, 0, 1 }
- Forum thread Using a new tool Eyegreeable With logos includes screen shots showing Light Light Cyan overcast
  - # Light Cyan overcast=win+alt+F12
    # “Normal Color” alternative with Red color intensity reduction
    { 0.878, 0, 0, 0, 0 }
    { 0, 1, 0, 0, 0 }
    { 0, 0, 1, 0, 0 }
    { 0, 0, 0, 1, 0 }
    { 0, 0, 0, 0, 1 }
Commercial Eyegreeable utility implements Dynamic Screen Filtering

Mac

Night Mode is quite easy on a Mac:

Press Ctrl-Opt-Cmd-8 to Invert screen colors
1. If nothing happens, Open System Preferences
2. Check Keyboard shortcuts for Accessibility – Invert colors

Alternative is using System Preferences to Invert color:

Open System Preferences
1. Click Accessibility
2. Click Display
3. Click Invert Colors