Hi ML52,
The E6B is just a flight computer function of the clipboard and doesn't have maps.
The clipboard itself does support field maps though-- you can right click on the terrain map of the clipboard and select "Clipboard Maps" from the pop up window. Here you should be able to chose from any of the map files found in your "maps" subfolder of your Aces High III installation folder.
If the map you want is not listed, instructions on adding maps can be found in the Help section of Aces High's website here:
http://www.hitechcreations.com/42-hitech-creations/affiliates/142-aces-high-help-field-mapsI use 8thJinx's clipboard maps - he's created a set of very well done and useful maps for both bases and strat targets (I think the troop facility is still missing though). I liked his work so much I created a Target Hardness Chart in the same style and put it in as a clipboard map too, so I can have an in-flight reference for how much bomb tonnage is required to take out a specific target. Here are the field maps I use, starting with the Medium Airfield:
And here are his strat target maps:
Refinery
Radar Factory
HQ
City
Ammo Factory
AA Factory
And lastly my Target Hardness Chart
Hope this helps, <S>
EDIT: Bummer, I just noticed Imgur changed all these bmp files I uploaded to type .png. You'll have to use an image editing program (MS Paint will work) to open them and then save them as bitmap files (.bmp) files before you can add them as clipboard maps...