Let’s look at the conclusion first

Switching between horizontal and vertical screens will change the available width and height, and the settings panel will also change from the vertical bottom panel to the horizontal side panel. Wait for the rearrangement to be completed; if the text is still cut off or the window position is inappropriate, then adjust the text width, font size and floating window position.

Troubleshooting steps

1. Wait for a moment after completing the rotation and do not operate continuously during the system animation.
2. Make sure the focus line and body text are still visible; click back to the beginning of the document to reposition if necessary.
3. Reduce the text width when horizontal lines are too long, and reduce font size or increase the available window height when vertical content is too crowded.
4. Check whether the window is close to the edge of the screen in floating mode and re-move or resize it.
5. Full screen and floating save different configurations to confirm that you are modifying the currently used set of settings.
6. If the problem persists, exit the prompt page and re-enter; if the problem persists, you can restore the default settings for the current type.

Notice

Rotation and size changes will affect the number of lines displayed on the screen, so when you return to the same reading progress, the visual position may be slightly different, but the content of the document will not change.