I'm not sure it's present, even if it's not present feature, I'm sure it's possible to add.
So if you'd have time to JB your Kindle and install 3rd party software then you could propose this feature to:
KOReader developers on
https://www.mobileread.com/forums/sho...d.php?t=209276
Customized CoolReader developer on
https://www.mobileread.com/forums/sho...d.php?t=229288
I hope this helps )