Cutting off?
Calibe scales pages when the selected output device is smaller.
Preferences: Common options: Page setup (on sidebar): TABLET << does not resize large images
THIS AFFECTS FUTURE: DEFAULT, 1st time conversions. The converted books remember the setting that was used.
If you have converted :
There is a Tick or Button (depends if single or bulk) on the Conversion screen
OR
You can leave the Default (above) alone and make a similar setting on the conversion start dialog (good for when you wish to override your default. Again, this setting will be saved for THIS BOOK only)