diff --git a/MotorControl/low_level.c b/MotorControl/low_level.c
index 14adaf6a..aa553f9d 100755
--- a/MotorControl/low_level.c
+++ b/MotorControl/low_level.c
@@ -45,7 +45,7 @@ static float elec_rad_per_enc = POLE_PAIRS * 2 * M_PI * (1.0f / (float)ENCODER_C
 // TODO: For nice encapsulation, consider not having the motor objects public
 Motor_t motors[] = {
     {   // M0
-        .control_mode = CTRL_MODE_POSITION_CONTROL,
+        .control_mode = CTRL_MODE_POSITION_CONTROL, //see: Motor_control_mode_t
         .enable_step_dir = false, //auto enabled after calibration
         .counts_per_step = 2.0f,
         .error = ERROR_NO_ERROR,
@@ -108,7 +108,7 @@ Motor_t motors[] = {
         .timing_log = {0}
     },
     {   // M1
-        .control_mode = CTRL_MODE_POSITION_CONTROL,
+        .control_mode = CTRL_MODE_POSITION_CONTROL, //see: Motor_control_mode_t
         .enable_step_dir = false, //auto enabled after calibration
         .counts_per_step = 2.0f,
         .error = ERROR_NO_ERROR,
diff --git a/README.md b/README.md
index 5bcdc98e..e37e9292 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,10 @@ An upcoming feature will enable automatic tuning. Until then, here is a rough tu
 * Back down `pos_gain` until you do not have overshoot anymore.
 * The integrator is not easily tuned, nor is it strictly required. Tune at your own discression.
 
+### Optional parameters
+By default both motors are enabled, and the default control mode is position control.
+If you want a different mode, you can change `.control_mode`. To disable a motor, set `.enable_control` and `.do_calibration` to false.
+
 ## Compiling and downloading firmware
 
 ### Getting a programmer