X-Received: by 2002:a05:620a:27c3:: with SMTP id i3mr4669725qkp.442.1637050261631; Tue, 16 Nov 2021 00:11:01 -0800 (PST) X-Received: by 2002:a25:361d:: with SMTP id d29mr4423213yba.520.1637050261447; Tue, 16 Nov 2021 00:11:01 -0800 (PST) Path: csiph.com!weretis.net!feeder6.news.weretis.net!news.misty.com!border2.nntp.dca1.giganews.com!nntp.giganews.com!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail Newsgroups: comp.graphics.apps.gnuplot Date: Tue, 16 Nov 2021 00:11:01 -0800 (PST) Injection-Info: google-groups.googlegroups.com; posting-host=164.90.159.88; posting-account=vSnbzAoAAABqLr3iEqhRzBpjFWfydIMO NNTP-Posting-Host: 164.90.159.88 User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <937e6fa1-092c-444a-87f6-aa57e75eb312n@googlegroups.com> Subject: how to print the line title From: chao zhou Injection-Date: Tue, 16 Nov 2021 08:11:01 +0000 Content-Type: text/plain; charset="UTF-8" Lines: 0 Xref: csiph.com comp.graphics.apps.gnuplot:4440 when i set out the png, the line title "xx" can not show, what is the problem?