diff --git a/src/display.cpp b/src/display.cpp
index d4786d19..4826b2a2 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -10,15 +10,16 @@ Display-Mask (128 x 64 pixel):
 0|PAX:aabbccddee
 1|PAX:aabbccddee
 2|B:a.bcV  Sats:ab
-3|BLTH:abcde SF:ab
+3|BLTH:abcde  SFab
 4|WIFI:abcde ch:ab
 5|RLIM:abcd abcdKB
 6|20:27:00* 27.Feb
 7|yyyyyyyyyyyyyyab
 
-line 6: * = time source indicator: L|G|R|?,
+line 6: * = char {L|G|R|?} indicates time source,
             inverse = clock controller is active,
             pulsed = pps input signal is active
+
 line 7: y = LMIC event message; ab = payload queue length
 
 */
@@ -206,7 +207,7 @@ void draw_page(time_t t, uint8_t page) {
     u8x8.setCursor(11, 3);
     if (!cfg.adrmode) // if ADR=off then display SF value inverse
       u8x8.setInverseFont(1);
-    u8x8.printf("%5s", getSfName(updr2rps(LMIC.datarate)));
+    u8x8.printf("%4s", getSfName(updr2rps(LMIC.datarate)));
     if (!cfg.adrmode) // switch off inverse if it was turned on
       u8x8.setInverseFont(0);
 #endif // HAS_LORA
diff --git a/src/lorawan.cpp b/src/lorawan.cpp
index 573e8aa5..d541dec3 100644
--- a/src/lorawan.cpp
+++ b/src/lorawan.cpp
@@ -646,12 +646,12 @@ uint8_t getBattLevel() {
 
 const char *getSfName(rps_t rps) {
   const char *const t[] = {"FSK",  "SF7",  "SF8",  "SF9",
-                           "SF10", "SF11", "SF12", "SFrfu"};
+                           "SF10", "SF11", "SF12", "SF?"};
   return t[getSf(rps)];
 }
 
 const char *getBwName(rps_t rps) {
-  const char *const t[] = {"BW125", "BW250", "BW500", "BWrfu"};
+  const char *const t[] = {"BW125", "BW250", "BW500", "BW?"};
   return t[getBw(rps)];
 }