>>254 その記事によれば次のとおりです。

If you have trouble resizing windows with the mouse, because the resizing borders are too thin, option "Marco (Adaptive compositor)" can help.

Options "Marco (No compositor)" and "Marco (Compton GPU compositor)" give you extremely thin window resizing borders that are hard to hit with the mouse.

Many users do not know or do not want to use the "Alt+mouse" window resizing method. Besides, if you are using a laptop touchpad or a remote desktop session, resizing windows with their borders may be the only comfortable option.

投稿した方は関連記事へのリンクも貼っています。
その記事もわかりやすく書かれています。以下のリンクです。
rdiez.shoutwiki.com/wiki/Installing_Linux#The_Window_Resizing_Borders_Are_Too_Thin