diff --git a/radio/src/gui/128x64/model_special_functions.cpp b/radio/src/gui/128x64/model_special_functions.cpp
index 7a50aff6d..d120965f5 100644
--- a/radio/src/gui/128x64/model_special_functions.cpp
+++ b/radio/src/gui/128x64/model_special_functions.cpp
@@ -68,7 +68,7 @@ void onCustomFunctionsFileSelectionMenu(const char * result)
     storageDirty(eeFlags);
   }
 }
-#endif
+#endif // CPUARM && SDCARD
 
 #if defined(PCBX7)
 
@@ -171,7 +171,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
     }
     POPUP_MENU_START(onCustomFunctionsMenu);
   }
-#endif
+#endif // PCBX7
 
   for (uint8_t i=0; i<NUM_BODY_LINES; i++) {
     coord_t y = MENU_HEADER_HEIGHT + 1 + i*FH;
@@ -196,7 +196,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
 #else
           drawSwitch(MODEL_SPECIAL_FUNC_1ST_COLUMN, y, CFN_SWITCH(cfn), attr | ((functionsContext->activeSwitches & ((MASK_CFN_TYPE)1 << k)) ? BOLD : 0));
           if (active || AUTOSWITCH_ENTER_LONG()) CHECK_INCDEC_SWITCH(event, CFN_SWITCH(cfn), SWSRC_FIRST, SWSRC_LAST, eeFlags, isSwitchAvailableInCustomFunctions);
-#endif
+#endif //CPUARM
 #if defined(CPUARM)
           if (func == FUNC_OVERRIDE_CHANNEL && functions != g_model.customFn) {
             func = CFN_FUNC(cfn) = func+1;
@@ -252,7 +252,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
 #endif
             break;
           }
-#endif
+#endif // GVARS
 #if defined(CPUARM)
           else if (func == FUNC_SET_TIMER) {
             maxParam = MAX_TIMERS-1;
@@ -260,7 +260,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
             if (active) CFN_TIMER_INDEX(cfn) = checkIncDec(event, CFN_TIMER_INDEX(cfn), 0, maxParam, eeFlags);
             break;
           }
-#endif
+#endif // CPUARM
           else if (attr) {
             REPEAT_LAST_CURSOR_MOVE();
           }
@@ -294,7 +294,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
 #else
             val_max = FUNC_RESET_PARAM_LAST;
             lcdDrawTextAtIndex(MODEL_SPECIAL_FUNC_3RD_COLUMN, y, STR_VFSWRESET, CFN_PARAM(cfn), attr);
-#endif
+#endif // CPUARM
           }
 #if defined(OVERRIDE_CHANNEL_FUNCTION)
           else if (func == FUNC_OVERRIDE_CHANNEL) {
@@ -304,14 +304,12 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
             val_min = -LIMIT_EXT_PERCENT; val_max = +LIMIT_EXT_PERCENT;
             lcdDrawNumber(MODEL_SPECIAL_FUNC_3RD_COLUMN, y, val_displayed, attr|LEFT);
           }
-#endif
+#endif // OVERRIDE_CHANNEL_FUNCTION
 #if defined(CPUARM)
           else if (func >= FUNC_SET_FAILSAFE && func <= FUNC_BIND) {
             val_max = NUM_MODULES-1;
             lcdDrawTextAtIndex(MODEL_SPECIAL_FUNC_3RD_COLUMN, y, "\004Int.Ext.", CFN_PARAM(cfn), attr);
           }
-#endif
-#if defined(CPUARM)
           else if (func == FUNC_SET_TIMER) {
             val_max = 539*60+59;
             drawTimer(MODEL_SPECIAL_FUNC_3RD_COLUMN, y, val_displayed, attr|LEFT, attr);
@@ -358,10 +356,12 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
           else if (func == FUNC_PLAY_VALUE) {
             val_max = MIXSRC_LAST_TELEM;
             drawSource(MODEL_SPECIAL_FUNC_3RD_COLUMN, y, val_displayed, attr);
-            INCDEC_SET_FLAG(eeFlags | INCDEC_SOURCE);
-            INCDEC_ENABLE_CHECK(isSourceAvailable);
+            if (active) {
+              INCDEC_SET_FLAG(eeFlags | INCDEC_SOURCE);
+              INCDEC_ENABLE_CHECK(isSourceAvailable);
+            }
           }
-#endif
+#endif // CPUARM && SDCARD
 #if defined(CPUARM)
           else if (func == FUNC_VOLUME) {
             val_max = MIXSRC_LAST_CH;
@@ -386,7 +386,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
             }
 #else
             lcdDrawNumber(MODEL_SPECIAL_FUNC_3RD_COLUMN, y, val_displayed+PROMPT_CUSTOM_BASE, attr|LEFT);
-#endif
+#endif // GVARS
           }
           else if (func == FUNC_PLAY_BOTH) {
             lcdDrawChar(MODEL_SPECIAL_FUNC_3RD_COLUMN+3*FWNUM, y, '|', attr);
@@ -439,7 +439,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
 #else
                 val_max = 1;
                 lcdDrawTextAtIndex(MODEL_SPECIAL_FUNC_3RD_COLUMN, y, PSTR("\003-=1+=1"), val_displayed, attr);
-#endif
+#endif // PCBX7
                 break;
             }
 
@@ -454,7 +454,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
               val_displayed = 0;
             }
           }
-#endif
+#endif // GVARS
           else if (attr) {
             REPEAT_LAST_CURSOR_MOVE();
           }
@@ -477,7 +477,7 @@ void menuSpecialFunctions(event_t event, CustomFunctionData * functions, CustomF
 #else
           if (active) {
             CFN_PARAM(cfn) = CHECK_INCDEC_PARAM(event, val_displayed, val_min, val_max);
-#endif
+#endif // PCBX7
           }
           break;
         }