--- a/NEWS Mon Mar 22 17:28:07 2021 +0100
+++ b/NEWS Mon Mar 22 17:33:08 2021 +0100
@@ -880,8 +880,11 @@
*** Document preparation ***
-* High-quality blackboard-bold symbols for A..Z, from font "txmia"
-(package "pxfonts").
+* More predefined symbols: \<interleave> \<sslash> (package "stmaryrd"), \<checkmark> \<crossmark> (package
+"pifont").
+
+* High-quality blackboard-bold symbols from font "txmia" (package
+"pxfonts"): \<bbbA>\<bool>\<complex>\<bbbD>\<bbbE>\<bbbF>\<bbbG>\<bbbH>\<bbbI>\<bbbJ>\<bbbK>\<bbbL>\<bbbM>\<nat>\<bbbO>\<bbbP>\<rat>\<real>\<bbbS>\<bbbT>\<bbbU>\<bbbV>\<bbbW>\<bbbX>\<bbbY>\<int>.
* Document markers are formal comments of the form \<^marker>\<open>marker_body\<close> that
are stripped from document output: the effect is to modify the semantic