The slider control is in the top right corner of the screen. Moving the slider left and right controls the size of the left and right portions of the screen.
ADDITIONAL NEXGEN 11.0 TUTORIALS:
Tutorial #1: nexgen 11.0 Accessory Database
Tutorial #2: nexgen 11.0 Audit Trail
Tutorial #3: nexgen 11.0 Icon Overview
Tutorial #4: nexgen 11.0 Results Database
Tutorial #5: nexgen 11.0 Sample Database
Tutorial #6: nexgen 11.0 Settings
Tutorial #7: nexgen 11.0 User Management