To change the calculator skin press Menu Settings > Calculator skin.
Skins included in MAcalc
There are several skins shipped with the calculator but if you want you can create your own custom skin.
Creating a new calculator skin
Skins are composed of a "skin.plist" file and a set of image files.
All files must be saved in a directory named "Skins\xxx\" where "xxx" is the skin name.
Files must be in a "zip" package format to be transferred to MAcalc via HTTP or FTP.
zip -r myskin.zip .\Skins
Use the following sample: skinsample.zip as a base to create a new skin.