Hello,
I know that iPads and tablets runs on different operating system softwares so I’m not sure if this would work or if you’ve tried this and also some people say tablet when they’re talking about their iPad so idk if you’re using an apple product or not but on my iPad I can’t use the writers portal to spot direct, however in the app I can when I preview my story there. There’s not a switch tool to change from scaling to moving but if you click spot directing, to move a character you use one finger and slide it around, to scale/size them, you pinch your fingers on it so using two fingers switches it to the scale tool. Pinch two fingers to make it smaller or spread two fingers to make it bigger. And on the bottom left it will show the spot coordinates that you’ll have to write down or memorize and type it into the portal. But it may not be the same for your tablet.
Happy writing 