The lg ge keyboard is an pretty advanced keyboard with alot of options and one of it is to resize your keyboard height.
See below for the download link and the link to the forum related to the dump. Sorryfor the. Bad thread. But i am uploading it from my phone. Sorry if someone posted it here before but then i didnt saw it.
Link to systemdump from g3
Link to lg g3 keyboard flashablezip
Link to lg g3 keyboard apk with installer and also flashable zip original port i think.
Link to guide with the apk installer even if its easy and with sounds and wallpapers.
The lg keyboard settings wil look different by you guys but i am using theme chooser.
Verstuurd vanaf mijn Nexus 4 met Tapatalk
Edit: keyboard is a bit low if you ask me so i will make it bigger or try to change the max height for adjust.