There’s a button on the right of it that allows different column types to be shown so you can see multiple data types at once.
If you’ve got a colum selected as the sort order it won’t allow you to drag the order of variables around.
If you change the type of a variable you need to remove it from the watch window then add it back again as otherwise the old datat type value is shown.
There are lots of options burried in Tools > Options > Editor > Formatting > Language: C > Other >. Its not obvious these exist unless you know!