Tvheadend

If you use Kodi, to do that use Kodi interface.

New to Tvheadend any hint, how to perform, previous Enigma2 box user, so need a method how to perform

In kodi interface, try few options, not able to arrange them in Alphabetical

In Kodi, if you go the the Channels screen of the TV section, it defaults to sorting by channel number. However, if you open the options menu there ought to be an option there to set the sort based upon the name of the channel.

In the Guide view of Kodi, however, channels are only displayed by number. Likewise with the OSD Channels display, IIRC.

You can mitigate the numbering options one of two ways. Firstly, you can renumber your channels in Tvheadend so that they are numbered based upon he name sort. Or, you can use Kodi's channel manager interface to renumber your channels. The first option would affect all clients connecting to your Tvheadend server, while the second would only apply to that particular instance of Kodi.

am not sure where are you looking for it

For me, interface is slightly different, its running with LibreELEC on Wetek play2 for me

All interfaces have sorting options.

I try to upload pic later, may you guide me further

Maby you use new Estuary uncomfortable theme?

My first job is to uninstall it

Yes, you got it, Thank you for Navigate me to the point

Its done by changing first skin, then arranged