I would like to customize the icons of Zumo and at the same time of Base Camp to have something that better corresponds to my travels. Thank you for your interest and excuse my English often helped by Google Translate!
EDIT :
I found for Base Camp :
Icons are made with Photoshop 64 x 64 px and export in .PNG with transparency.
After put into :
MAC > user > [name of the user] > Library > Application support > Garmin > Way points symbols...
Sample :
