[FR] Add a theme style settings option

[JeffeyChou]

Describe your request

Hi RyotaUshio,

I have been using PDF++ for a while and found it pretty useful when reading my academic papers.

However I found it difficult to read when I switch to dark theme, especially the crossref text. See the pic below for more details.

As you can see, the text in the boxes are very difficult to identify when using the dark theme. But it looks better when switch to light theme.

So I wonder could you please add a setting related to the PDF rendering, like define the color of the background, and the color in the crossref text.

Thank you again for the contribution to this wonderful plugin!

[RyotaUshio]

Seems like you are using Style Settings and Minimal (or any other theme with PDF color inversion). Minimal has an option called "Invert PDFs in dark mode", which is a bit confusing because it behaves somewhat similarly to Obsidian's built-in "Adapt to theme" option.

• If you prefer white background, go to Style Settings > Minimal > PDFs and turn off "Invert PDFs in dark mode". Then in the PDF toolbar, open the toggle menu next to the zoom buttons, and make sure "Adapt to theme" is turned off.
• If you prefer dark background, turn on "Invert PDFs in dark mode", and turn off "Adapt to theme".

Let me know if this doesn't solve the problem.