diff --git a/top/top.c b/top/top.c
index f064c29d..3aae009e 100644
--- a/top/top.c
+++ b/top/top.c
@@ -4685,8 +4685,16 @@ static inline const char *forest_display (const WIN_t *q, int idx) {
 #endif
       return buf;
    }
-   if (level > 100) snprintf(buf, sizeof(buf), "%400s%s", " +  ", which);
+   if (level > 100) {
+      snprintf(buf, sizeof(buf), "%400s%s", " +  ", which);
+      return buf;
+   }
+#ifndef FOCUS_VIZOFF
+   if (q->focus_pid) snprintf(buf, sizeof(buf), "|%*s%s", ((4 * level) - 1), "`- ", which);
    else snprintf(buf, sizeof(buf), "%*s%s", (4 * level), " `- ", which);
+#else
+   snprintf(buf, sizeof(buf), "%*s%s", (4 * level), " `- ", which);
+#endif
    return buf;
  #undef rSv
  #undef rSv_Lvl
diff --git a/top/top.h b/top/top.h
index 3e28afe4..52797729 100644
--- a/top/top.h
+++ b/top/top.h
@@ -31,6 +31,7 @@
 //#define EQUCOLHDRYES            /* yes, equalize the column header lengths */
 //#define FOCUS_HARD_Y            /* 'F' will avoid topmost task distortions */
 //#define FOCUS_TREE_X            /* 'F' resets forest view indentation to 0 */
+//#define FOCUS_VIZOFF            /* 'F' doesn't provide the visual clue '|' */
 //#define GETOPTFIX_NO            /* do not address getopt_long deficiencies */
 //#define INSP_JUSTNOT            /* do not smooth unprintable right margins */
 //#define INSP_OFFDEMO            /* disable demo screens, issue msg instead */