View USART1 in Debugger??

Hello,

New with STM/Keil don't "kill" me. (I already went true a lot of documentation)
But now I took the next step "Hello" on Uart1. Configured all settings with STMCUBE
Then added this code in the main part. (See below).
I expected that in Debug mode (I use J-Link Segger) when I opened the serial window and selected "Uart1", I would see "Hello" on the screen.....
And if the debugger cant show the Uart1 data in the serial terminal, what is then the use of this functionality.....?

Setup: Keil-Lite (can this be the reason for my problem???)/ STM32F103VC/ J-Link Segger debugger

int main(void)
{

HAL_Init();

SystemClock_Config();

MX_GPIO_Init();

MX_TIM1_Init();

MX_USART1_UART_Init();

/* USER CODE BEGIN 2 */

char *msg = "Hello";

HAL_UART_Transmit(&huart1, (uint8_t*)msg, 6, 0xFFFF);

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