--- orig/arduino-1.8.19/hardware/teensy/avr/cores/teensy4/usb_mouse.h	2022-01-03 16:07:38.265807198 -0500
+++ arduino-1.8.19/hardware/teensy/avr/cores/teensy4/usb_mouse.h	2022-01-01 00:37:46.550349988 -0500
@@ -44,6 +44,7 @@
 void usb_mouse_configure(void);
 int usb_mouse_buttons(uint8_t left, uint8_t middle, uint8_t right, uint8_t back, uint8_t forward);
 int usb_mouse_move(int8_t x, int8_t y, int8_t wheel, int8_t horiz);
+int usb_mouse_mask_and_move(uint8_t mask, int8_t x, int8_t y, int8_t wheel, int8_t horiz);
 int usb_mouse_position(uint16_t x, uint16_t y);
 void usb_mouse_screen_size(uint16_t width, uint16_t height, uint8_t mac);
 extern uint8_t usb_mouse_buttons_state;
@@ -98,6 +99,9 @@
 			usb_mouse_move(0, 0, 0, 0);
 		}
 	}
+	void mask_and_move(uint8_t b, int8_t x, int8_t y, int8_t wheel, int8_t horiz) {
+	        usb_mouse_mask_and_move(b,x,y,wheel,horiz);
+	}
         bool isPressed(uint8_t b = MOUSE_ALL) {
 		return ((usb_mouse_buttons_state & (b & MOUSE_ALL)) != 0);
 	}
--- orig/arduino-1.8.19/hardware/teensy/avr/cores/teensy4/usb_mouse.c	2022-01-03 16:07:38.262807207 -0500
+++ arduino-1.8.19/hardware/teensy/avr/cores/teensy4/usb_mouse.c	2022-01-01 00:34:57.020952842 -0500
@@ -190,6 +190,11 @@
 	return usb_mouse_transmit(buffer, 6);
 }
 
+int usb_mouse_mask_and_move(uint8_t mask, int8_t x, int8_t y, int8_t wheel, int8_t horiz) {
+        usb_mouse_buttons_state = mask;
+        return usb_mouse_move(x,y,wheel,horiz);
+}
+
 int usb_mouse_position(uint16_t x, uint16_t y)
 {
 	if (x >= usb_mouse_resolution_x) x = usb_mouse_resolution_x - 1;