Yes, a device's On screen keyboard (OSK) can be used with Co:Writer Universal. See below for Windows PC, Mac, or ChromeBook.
Windows OS:
OSK works well with the Chrome Extension & Chrome App
Numbers need to be toggled off (extension) to type numbers and toggled back on to use numbers for word choice.
Numbers need to be put to sleep (Chrome App) by using ESC key and +/= to resume to use for word choices
Mac
OSK works well with Chrome Extension & Chrome App
Numbers need to be toggled off (extension) to type numbers and toggled back on to use numbers for word choice.
Numbers need to be put to sleep (Chrome App) by using ESC key and +/= to resume to use for word choices
ChromeBook
To use the OSK with the Chrome Extension the numbers have to be toggled off.
To use the OSK with the Chrome App, you will need to put Co:Writer to sleep by using the ESC key and +/= to resume.