CPDFView has four special color modes: dark mode, sepia mode, reseda mode, and custom color mode.
In dark mode, colors are adjusted to improve reading at night or in a poorly-lit environment, in sepia mode, background color is set to emulate the look of an old book, in reseda mode, light-green background is displayed to protect your eyes after long-time reading, and in custom color mode, you can set a custom color for the background color.
Note: Changing the appearance mode will change the PDF rendering style, but it does not modify the PDF on disk.
To set the color mode:
1. Find the constant value of the color mode
| Themes | Constant value |
|---|---|
| Normal color mode | Draw_Mode_Normal |
| Night mode | Draw_Mode_Dark |
| Sepia mode | Draw_Mode_Soft |
| Reseda mode | Draw_Mode_Green |
| Custom color mode | Draw_Mode_Custom |
2. Call CPDFViewer.SetDrawMode(DrawModes drawMode).
3. If you are using Draw_Mode_Custom, call CPDFViewer.SetDrawMode(DrawModes.Draw_Mode_Custom, uint customBgColor)