Sorry.

Marlin/example_configurations/Hephestos/Configuration_adv.h

@@ -228,7 +228,7 @@
 #define INVERT_Z_STEP_PIN false
 #define INVERT_E_STEP_PIN false
 
-//default stepper release if idle
+//default stepper release if idle. Set to 0 to deactivate.
 #define DEFAULT_STEPPER_DEACTIVE_TIME 60
 
 #define DEFAULT_MINIMUMFEEDRATE       0.0     // minimum feedrate

Marlin/example_configurations/K8200/Configuration_adv.h

@@ -228,7 +228,7 @@
 #define INVERT_Z_STEP_PIN false
 #define INVERT_E_STEP_PIN false
 
-//default stepper release if idle
+//default stepper release if idle. Set to 0 to deactivate.
 #define DEFAULT_STEPPER_DEACTIVE_TIME 60
 
 #define DEFAULT_MINIMUMFEEDRATE       0.0     // minimum feedrate

Marlin/example_configurations/SCARA/Configuration_adv.h

@@ -228,7 +228,7 @@
 #define INVERT_Z_STEP_PIN false
 #define INVERT_E_STEP_PIN false
 
-//default stepper release if idle
+//default stepper release if idle. Set to 0 to deactivate.
 #define DEFAULT_STEPPER_DEACTIVE_TIME 240
 
 #define DEFAULT_MINIMUMFEEDRATE       0.0     // minimum feedrate

Marlin/example_configurations/WITBOX/Configuration_adv.h

@@ -228,7 +228,7 @@
 #define INVERT_Z_STEP_PIN false
 #define INVERT_E_STEP_PIN false
 
-//default stepper release if idle
+//default stepper release if idle. Set to 0 to deactivate.
 #define DEFAULT_STEPPER_DEACTIVE_TIME 60
 
 #define DEFAULT_MINIMUMFEEDRATE       0.0     // minimum feedrate

Marlin/example_configurations/delta/Configuration_adv.h

@@ -226,7 +226,7 @@
 #define INVERT_Z_STEP_PIN false
 #define INVERT_E_STEP_PIN false
 
-//default stepper release if idle
+//default stepper release if idle. Set to 0 to deactivate.
 #define DEFAULT_STEPPER_DEACTIVE_TIME 60
 
 #define DEFAULT_MINIMUMFEEDRATE       0.0     // minimum feedrate

Marlin/example_configurations/makibox/Configuration_adv.h

@@ -225,7 +225,7 @@
 #define INVERT_Z_STEP_PIN false
 #define INVERT_E_STEP_PIN false
 
-//default stepper release if idle
+//default stepper release if idle. Set to 0 to deactivate.
 #define DEFAULT_STEPPER_DEACTIVE_TIME 60
 
 #define DEFAULT_MINIMUMFEEDRATE       0.0     // minimum feedrate

Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h

@@ -227,7 +227,7 @@
 #define INVERT_Z_STEP_PIN false
 #define INVERT_E_STEP_PIN false
 
-//default stepper release if idle
+//default stepper release if idle. Set to 0 to deactivate.
 #define DEFAULT_STEPPER_DEACTIVE_TIME 60
 
 #define DEFAULT_MINIMUMFEEDRATE       0.0     // minimum feedrate