diff --git a/src/ui_signal_page.cpp b/src/ui_signal_page.cpp
index 529cd0e..7643b6e 100644
--- a/src/ui_signal_page.cpp
+++ b/src/ui_signal_page.cpp
@@ -66,6 +66,18 @@ std::size_t tagged(GtkButton* b) {
   return static_cast<std::size_t>(GPOINTER_TO_SIZE(g_object_get_data(G_OBJECT(b), "udpscope-signal")));
 }
 
+/// The wire types and quantisations the CONFIG names (`UDPS_T_*`, `UDPS_QUANT_*`; every source fills the same
+/// codes). A code outside the table is shown as the number, not guessed at.
+std::string type_name(unsigned code) {
+  static const char* const names[] = {"uint8", "int8", "uint16", "int16", "uint32",
+                                      "int32", "uint64", "int64", "float32", "float64"};
+  return code < 10 ? names[code] : "unknown (" + std::to_string(code) + ")";
+}
+std::string quant_name(unsigned code) {
+  static const char* const names[] = {"none", "uint8", "int8", "uint16", "int16"};
+  return code < 5 ? names[code] : "unknown (" + std::to_string(code) + ")";
+}
+
 /// One row of the details grid: the name left, the value right-aligned in tabular figures, the value's
 /// unit in a column of its own (so the digits line up whatever the unit is), and, for a value the user can
 /// change, a pencil that edits just that one.
@@ -100,8 +112,8 @@ GtkWidget* build_info_grid(App& app, std::size_t index, const SignalInfo& sig,
       {"Offset:", format_calibration(cal.second), sig.unit, "udpscope-offset",
        "edit the offset, applied at ingest",
        2},
-      {"Type:", std::to_string(int(sig.type_code)), "", nullptr, nullptr, -1},
-      {"Quantisation:", std::to_string(int(sig.quant_type)), "", nullptr, nullptr, -1},
+      {"Type:", type_name(sig.type_code), "", nullptr, nullptr, -1},
+      {"Quantisation:", quant_name(sig.quant_type), "", nullptr, nullptr, -1},
       {"Size:", size, "", nullptr, nullptr, -1},
       {"Range:", format_calibration(sig.range_min) + " .. " + format_calibration(sig.range_max), sig.unit,
        nullptr, nullptr, -1},
@@ -119,20 +131,25 @@ GtkWidget* build_info_grid(App& app, std::size_t index, const SignalInfo& sig,
     GtkWidget* name_label = gtk_label_new(row.label);
     gtk_widget_set_halign(name_label, GTK_ALIGN_START);
     gtk_grid_attach(GTK_GRID(grid), name_label, 0, r, 1, 1);
+    // An editable value sits against its label with the pencil right after it; a read-only one is pushed to
+    // the right edge, so the two kinds read as two columns.
+    const bool editable = row.edit >= 0;
+    GtkWidget* cell = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 6);
+    gtk_widget_set_hexpand(cell, true);
+    gtk_widget_set_halign(cell, editable ? GTK_ALIGN_START : GTK_ALIGN_END);
     GtkWidget* value = gtk_label_new(row.value.c_str());
     gtk_widget_add_css_class(value, "numeric");
     if (row.id != nullptr) gtk_widget_set_name(value, row.id);
-    gtk_label_set_xalign(GTK_LABEL(value), 1.0f);
-    gtk_label_set_width_chars(GTK_LABEL(value), 14);
-    gtk_widget_set_hexpand(value, true);
-    gtk_widget_set_halign(value, GTK_ALIGN_END);
-    gtk_grid_attach(GTK_GRID(grid), value, 1, r, 1, 1);
-    GtkWidget* unit = gtk_label_new(row.unit.c_str());
-    gtk_widget_add_css_class(unit, "dim-label");
-    gtk_label_set_xalign(GTK_LABEL(unit), 0.0f);
-    gtk_label_set_width_chars(GTK_LABEL(unit), 4);
-    gtk_label_set_ellipsize(GTK_LABEL(unit), PANGO_ELLIPSIZE_END);
-    gtk_grid_attach(GTK_GRID(grid), unit, 2, r, 1, 1);
+    gtk_label_set_xalign(GTK_LABEL(value), editable ? 0.0f : 1.0f);
+    gtk_label_set_wrap(GTK_LABEL(value), !editable);
+    gtk_box_append(GTK_BOX(cell), value);
+    if (!row.unit.empty()) {
+      GtkWidget* unit = gtk_label_new(row.unit.c_str());
+      gtk_widget_add_css_class(unit, "dim-label");
+      gtk_label_set_ellipsize(GTK_LABEL(unit), PANGO_ELLIPSIZE_END);
+      gtk_box_append(GTK_BOX(cell), unit);
+    }
+    gtk_grid_attach(GTK_GRID(grid), cell, 1, r, 1, 1);
     if (row.edit >= 0) {
       GtkWidget* edit = gtk_button_new_from_icon_name("document-edit-symbolic");
       gtk_widget_add_css_class(edit, "flat");
@@ -151,7 +168,7 @@ GtkWidget* build_info_grid(App& app, std::size_t index, const SignalInfo& sig,
                          }
                        }),
                        &app);
-      gtk_grid_attach(GTK_GRID(grid), edit, 3, r, 1, 1);
+      gtk_box_append(GTK_BOX(cell), edit);
     }
     ++r;
   }
@@ -558,11 +575,9 @@ gboolean signal_page_probe(gpointer user) {
       return std::string(gtk_widget_get_name(w)) == "udpscope-calibration";
     });
     int seen = 0;
-    for (GtkWidget* c = grid == nullptr ? nullptr : gtk_widget_get_first_child(grid); c != nullptr;
-         c = gtk_widget_get_next_sibling(c)) {
-      if (GTK_IS_BUTTON(c) && gtk_button_get_icon_name(GTK_BUTTON(c)) != nullptr && seen++ == n) return c;
-    }
-    return nullptr;
+    return grid == nullptr ? nullptr : find_descendant(grid, [&](GtkWidget* c) {
+      return GTK_IS_BUTTON(c) && gtk_button_get_icon_name(GTK_BUTTON(c)) != nullptr && seen++ == n;
+    });
   };
   // Click pencil `n`, find the dialog titled `title`, set its `Spin`/`Entry`, press Apply. Returns the number
   // of editing widgets the dialog had, or -1 when there was no dialog.