Here is the new one-handed keyboard for Windows 10 on phablets

[Windows Central]

Although Microsoft rattled off numerous new apps found in Windows 10 Technical Preview for Phone build 10051, one feature we previously did not know about slipped by us: one-handed thumb keyboard for large screen phones.

Evidently, Microsoft is giving users an option to have the full-sized keyboard, or a smaller 'squished' one that justifies left or right, depending on your preferred hand usage.

Full story from the WindowsCentral blog...