Heavydust Thanks for your report! However, as far as I have tested with 4.2.29, I was able to change the brush size of the weight using the hotkey without any problems. Please note that you must have the Weight
tool selected in order to change the brush size of the weight. I've recorded a video to demonstrate this:
(For your information, I have used the tool buttons to switch to the active tool for easier understanding, but you can also use the hotkey. The hotkey for the Weight
tool is G
.)
If you are still unable to change the brush size using the hotkeys when the Weight
tool is selected, please let us know.