Keyboard shortcut for tags

I wish there were a keyboard shortcut option to open the “Tags” widget. On Gmail’s web interface, hitting “l” will bring the “Labels” widget, allowing me to label a message with the keyboard alone.
It will be great to have the same on eM Client.

I have moved from Thunderbird, reluctantly. TB. has excellent and simple tagging. It is the MAIN reason I used it.
I am trialling emClient and I am finding a few issues that don’t seem to work.

Tags -
I am a Mac user and I can see ONLY Cmd +F# as an option for shortcuts. This doesn’t even work for any tagging. Nothing happens!

Cmd + F# is not a practical use for me. I want to use CTRL + num.

Are there any ways around this restriction?