It is possible to customize PDF Studio appearance by choosing among the various look and feel options.

Edit->Preferences.
Click on Display on the left.
Choose Look and Feel in the combo.

PDF Studio 10 and later

OS Look & Feel

Windows Look and Feel (Default)  Windows_Default Mac OS Look & Feel (Default) MAC_default
Linux Look & FeelLinux_Default

 

Nimbus

Nimbus on Windows

BlueWindows_Blue GreenWindows_Green
GreyWindows_Gray Red   Windows_Red
Nimbus on Mac OS
BlueMAC_nimbus_blue GreenMAC_nimbus_green
GreyMAC_nimbus_grey Red   Windows_Red
Nimbus on Linux
Nimbus BlueLinux_Blue Nimbus Green               Linux_Green
Nimbus GreyLinux_Grey Nimbus Red (Default) Linux_Red

Metal

Metal on WindowsWindows_Metal Metal on MacOSMAC_metal
Metal on LinuxLinux_Metal2

 

PDF Studio 9 and ealier

OS Look and Feel

Windows
os windows
OS X
osx
Linux
gtk

Substance

Business
substance-business
Business Blue Steelsubstance business blue steel
Creme
substance creme
Creme Coffee
substance creme coffee
Graphite
substance graphite

Nimbus

Blue
nimbus blue
Green
nimbus green
Grey
nimbus grey
Red
nimbus red
Metal
metal