measuring tool issue

https://jskup.fr/wp-content/uploads/2023/12/MT-size.jpgHello, I have the latest version of TM, I don’t understand how to use the measurement tool because it displays a huge “big bulb” at the starting point of the measurement. This makes it difficult to read the measurement, and yet I see on older videos that you could adjust the thickness of the tool…
thanks for your help