I would like to change the chat box height, because creating commands with bigger chat box would be so much easier, I know I can change the width be using mouse to drag the chat window but it makes the video smaller.
I tried to use Stylish also and I managed to make it bigger but then the buttons below chat goes top of the chat box. I can not find Stylish command to move the chat box little higher.
If you needed more room you could go to the twitch popout chat in a different tab.
twitch.tv/USERNAME/chat?popout=
This will open a chat that will spam your whole screen. This should be more than enough room to make your command. Just change the USERNAME and you’re good to go.