Shortcut to Set minimum gap of a subtitle

[GardfieldMe]

Hi,

I'm familiar with the Shortcut Settings editor and have many already customized.
However, I don't know how to assign a shortcut that sets the minimum gap to the current subtitle.
Same question to assign the minimum duration.

I'm using Subtitle Edit ver. 3.6.13

Is this possible?
Any suggestions welcome.

Thanks.