Arduino for STM32

Hello,

I can't select some boards on Arduino IDE. For example Generic STM32F401RE.

There is no arrow for scrolling. Also mouse scrolling not work.
My screen resoltion: 1366x768. If I use high resolution monitor (1920x1080) board list have enough space to drawn.

Anyone have the same problem? Or just me?

Screen resoltion: 1366x768
Arduino IDE version: 1.8.13
STM32Duino version 1.9.0
Java: Lastest version
Windows 10

Here is the screeen shot:

I never met this. As it seems linked to Arduino IDE tou should raised an issue on GitHub.

Hello.
In the screenshot, we can see a lot of cards of STM32F4xx family, and the black or DIY MORE series !
I'm very interesting to know what is the used core of this picture.
thank you.

for stm32 f4xx, my guess is you would need to find out the crystal frequency on your board, then go into the variants and check the divisors and crystal frequencies it is intended for. it should work if you choose a variant with a crystal frequency matching your board.
a thing is to choose the matching mcu if possible

I've opened an issue to arduino. It is fixed and released in the 1.8.15.

"Weird" also happens when the IDE is not restarted (sometimes, changes with IDE versions.) Best Practice is to restart the IDE after configuration changes.