I'm pretty sure you can't change the style of the 'native' popup menus and drop-down lists in FMGo. However, alternatively you could use a Popover Button, with a portal displaying options in the popover panel... This will give you a lot of flexibility in how you would like to style it so that it displays what you want, as well as allowing you to filter and sort the options that are shown in the portal. See attached example file... you will see that there is a Popover Button positioned behind the text field for which a value is to be set....
hope this helps,
DropDown.fmp12.zip 67.0 K