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Hi, actually it does work in the files section as you can see in the screenshot below.

In the file transfer screen it doesn't work, because this file view is in a mode that allows you to select multiple files.

I plan to make the bar configurable in an update.
Hello, you can scroll the row of additional rows horizontally to get to more keys like the semicolon.
Added a cursor navigation wheel in Textastic 2.2.