[w3m-dev:04486] w3m NOT ASSIGNED keys quick usage

Hi there,

I am forwarding a question sent to me from 積丹尼さん。
Recap in Japanese:
　H コマンドで表示されるキーバインドのうち <NOT ASSIGNED> な機能
を、その場で使う方法はありますか?

-------------------- Start of forwarded message --------------------
From: 積丹尼 Dan Jacobson <[email protected]>
To: Katsumi Yamaoka <[email protected]>
Subject: w3m NOT ASSIGNED keys quick usage
Date: Thu, 22 Jun 2017 22:11:03 +0800
Message-ID: <[email protected]>

In emacs we can do M-x to use commands that are not assigned to keys.

In plain w3m is there a way to do
"M-x NEXT"
for the NOT ASSIGNED keys? (just to use them once quickly). Thanks.

$ w3m ...
H

Buffer Operations

B                    Close current buffer and return to the one below in stack (BACK)
<NOT ASSIGNED>       Switch to the next buffer (NEXT)
<NOT ASSIGNED>       Switch to the previous buffer (PREV)
-------------------- End of forwarded message --------------------

Thanks in advance.
Regards,