Hi
Yes there are lots of ways to move chars around such as using Cut, Copy, Paste, Swap, Reverse Order, Cycle Order.
The Paste function has 3 versions (insert, overwrite, append) depeding on how you want to do it.
You can swap any two characters by selecting one and then selecting another with CTRL held.
Have a look in the "Chars" menu when the Char Set form is active for all the options.