I use this quite a lot to rapidly inspect a map but I suspect I'm in a minority which is why it no longer seems to be present. From the manual (cwb.pdf):
Roaming Mode enables you to view several locations on the map without having to click the mouse on each one.
To start Roaming Mode, type Z. Thereafter, the Hot Spot will follow the mouse
as you move it over the map. To leave Roaming Mode, click on any hex.
As you can see it used to be in Civil War Battles but now the Z key is mapped to Brigade Colours. It still is in the Napoleonic series (or least the ones I have).
My attempts to put it back in have been to no avail. Every JTS executable seems to have what is called a "Accelerator Table". This allows the mapping of Keyboard shortcuts to a Command ID - the same Command ID can be attached to Menu items and Toolbar buttons (simplifies the handling of User Interaction). From the Waterloo Exe:
Code:
VK_X, 1503, VIRTKEY
VK_Z, 1505, VIRTKEY
VK_NEXT, 303, VIRTKEY
Command ID 1505 was the thing. In Campaign Antietam I attempted to map it to the "+" Numpad key (unused as far as I can tell)
Code:
VK_SUBTRACT, 806, VIRTKEY
VK_ADD, 1505, VIRTKEY
VK_NEXT, 303, VIRTKEY
I now have the "+" mapped to something which toggles "Continuous Mode" on and off
... whatever that is.