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camera_move_zoom_in = wheel-up
camera_move_zoom_out = wheel-down

camera_dc_zoomin = up
camera_dc_zoomout = down

These settings exist in the "/Config/keybinds.txt" file play around with them but I think you can also edit them from the menu.
 
How to change Mouse Wheel setting

I have been searching constantly for the files neccessary to change the mousewheel setting since I don't have a mouse on my laptop. I want to change it to the up and down arrow keys...

PLEASE HELP....send exactly where to go once you get to the Hearts of Iron 3 file in Paradox Ineractive

Thanks
 
PLEASE HELP....send exactly where to go once you get to the Hearts of Iron 3 file in Paradox Ineractive

Thanks

You must mean East India Company, right? ;)

C:\Program Files (x86)\Steam\steamapps\common\east india company\Config

That's for Windows 7 and the Steam version of EIC.

While you are at it, change

show_ship_names = g


to

show_ship_names = n


Otherwise it will conflict with show gui. That's a bug.