Horizontal Splitter
Left pane
size: 25%
min: 60px
Middle pane
size: 50%
min: 60px
Right pane
size: 25%
min: 60px
Vertical Splitter
Top pane
size: 30%
min: 60px
Middle pane
size: 45%
min: 60px
Bottom pane
size: 25%
min: 60px