On the web, you’ll find the font size button in the top of the e-reader:

And the color mode switcher in the user dropdown:

In the smartphone app, the color mode and font settings are on top of the book / manuscript:

On the web, you’ll find the font size button in the top of the e-reader:
And the color mode switcher in the user dropdown:
In the smartphone app, the color mode and font settings are on top of the book / manuscript: