Currently there seems to be no way to open the options of dropdown commands like "Font Family" or "Font Size".
The typical hotkeys of the according Kendo UI widgets (ALT + Arrow down) are not working and we have not found any other.
This can be reproduced in its online demo:
https://demos.telerik.com/kendo-ui/editor/keyboard-navigation?_gl=1*1jjk3dq*_gcl_au*NjE0NTE0MTQ0LjE3MjYwNTc4MjU.*_ga*MTk3MTcyODQ3My4xNjkwMjkyNTYw*_ga_9JSNBCSF54*MTcyOTY3MzExMS44My4xLjE3Mjk2NzQwMzAuMzEuMC4w
Hello Michael,
When a tool is focused you can change its state using the 'Enter' key. Then you can press the Alt + Down arrow to open the popup of the "Font Family" or "Font Size" tools. If you need to change the state so you could use the left/right arrows to focus the next tool, you can press 'Esc'. Here is a screencast that demonstrates the behavior - https://somup.com/cZ6vi1H8gC.
With the above said I am changing the item's status to 'Declined'. Let me know if you have any additional questions on the matter.
Regards,
Neli
Progress Telerik
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