diff -r 122648e3effb -r d50c2129e73a src/Pure/Tools/build.scala
--- a/src/Pure/Tools/build.scala	Thu Aug 18 12:02:20 2022 +0200
+++ b/src/Pure/Tools/build.scala	Thu Aug 18 12:48:01 2022 +0200
@@ -487,7 +487,6 @@
     if (!no_build && !progress.stopped && results.ok) {
       if (presentation_sessions.nonEmpty) {
         val presentation_dir = presentation.dir(store)
-        progress.echo("Presentation in " + presentation_dir.absolute)
         Presentation.update_root(presentation_dir)
 
         for ((chapter, infos) <- presentation_sessions.groupBy(_.chapter).iterator) {
@@ -501,7 +500,6 @@
 
           Par_List.map({ (session: String) =>
             progress.expose_interrupt()
-            progress.echo("Presenting " + session + " ...")
 
             val html_context =
               Presentation.html_context(deps.sessions_structure, Presentation.elements1,