[Question] what is the 'select' option for?

[greyHairChooseLife]

To leave comment, I can box some code lines with visual mode, and execute :'<,'>GHCreateThread.

I don't know why I need options like these.

  -- if selectable, select the object under the cursor for additional operations.
  select = "gs",
  -- if selectable, clear all selected items.
  clear_selection = "gss",

What are they for? Or is there a tastier way to do?

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And very relevant issue about it I guess, how can I select some deleted line to leave in comment? It just always fail.(dialog says 'Failed to create new comment')

I am sure it is possible. Because,

• a few times [+] icons (saying I can select line to refer in comment) show successfully for those deleted lines.
• saw in the Youtube video
• I can open thread.