diff --git a/src/base/itertools.hh b/src/base/itertools.hh
index afe06988c6..6ee179722e 100644
--- a/src/base/itertools.hh
+++ b/src/base/itertools.hh
@@ -602,7 +602,7 @@ template<typename T,
          typename F,
          std::enable_if_t<lnav::func::is_invocable<F, T>::value, int> = 0>
 void
-operator|(std::vector<std::shared_ptr<T>>& in,
+operator|(const std::vector<std::shared_ptr<T>>& in,
           const lnav::itertools::details::for_eacher<F>& eacher)
 {
     for (auto& elem : in) {
@@ -610,6 +610,18 @@ operator|(std::vector<std::shared_ptr<T>>& in,
     }
 }
 
+template<typename T,
+         typename F,
+         std::enable_if_t<lnav::func::is_invocable<F, T>::value, int> = 0>
+void
+operator|(const std::vector<T>& in,
+          const lnav::itertools::details::for_eacher<F>& eacher)
+{
+    for (auto& elem : in) {
+        lnav::func::invoke(eacher.fe_func, elem);
+    }
+}
+
 template<typename T,
          typename F,
          std::enable_if_t<lnav::func::is_invocable<F, T>::value, int> = 0>
diff --git a/src/files_sub_source.cc b/src/files_sub_source.cc
index 5ce9bf6f61..36d75d4be2 100644
--- a/src/files_sub_source.cc
+++ b/src/files_sub_source.cc
@@ -583,8 +583,26 @@ files_sub_source::text_selection_changed(textview_curses& tc)
                 }
                 details.emplace_back(line);
             }
-            auto match_msgs = lf->get_format_match_messages();
 
+            if (lf->get_format_ptr() != nullptr) {
+                const auto um = lnav::console::user_message::info(
+                    attr_line_t("The file contents matched this log format and "
+                                "will be shown in the LOG view"));
+                um.to_attr_line().rtrim().split_lines()
+                    | lnav::itertools::for_each([&details](const auto& al) {
+                          details.emplace_back(attr_line_t("    ").append(al));
+                      });
+            } else {
+                const auto um = lnav::console::user_message::info(attr_line_t(
+                    "The file contents did not match any log "
+                    "formats and can be accessed in the TEXT view"));
+                um.to_attr_line().rtrim().split_lines()
+                    | lnav::itertools::for_each([&details](const auto& al) {
+                          details.emplace_back(attr_line_t("    ").append(al));
+                      });
+            }
+
+            const auto& match_msgs = lf->get_format_match_messages();
             details.emplace_back(
                 attr_line_t("    ").append("Match Details"_h3));
             for (const auto& msg : match_msgs) {