The commerce screen appears to limit the player to only 10 units per mouse click. That's too slow. How can I enable it to allow 100 or 1000 per mouse click?

Frequently I "put down" a commander/army in a spot where it
becomes impossible to pick him up again.

Within the directed-battle screen, the scroll function does not work
well. Frequently the screen will rotate wildly and the game has to
be paused to make it stop. Holding down the center mouse button to
negate "spin" isn't a good solution.

I've purchased the Gog.com version of the game. Is this the most-up-to-date patch version?

I've read that there is a speed slider on the combat screen, where is this located? Thanks.