A p p e n d i x D O n - s c r e e n C o n t r o l sD - 1 2 I n s t r u c t i o n s f o r U s e2D-Mode Parameter SelectionsSelection DescriptionTrapezoid Trapezoid/LinearEnables linear or trapezoid image format for linear transducers. On displays a trapezoid image. Off displays a linear image.Note: For systems without a touch screen, the selection is assigned to a soft key.Space Time Adjusts the balance between the image line density (resolution) and the frame rate. 0 to 3Note: For systems without a touch screen, the selection is on the LED panel.Maps Selects a processing curve that assigns echo amplitudes to gray levels. A, B, C, D, E, FNote: For systems without a touch screen, the selection is on the LED panel.Tint Changes the color of the image by adding blue, red, yellow, or green to the gray in a gray map. Available settings: transducer-dependentNote: For systems without a touch screen, the selection is on the LED panel.Edge Edge EnhancementDistinguishes the contours of a structure during imaging. 0 (none) 1 to 4Note: For systems without a touch screen, the selection is on the LED panel.Persist PersistenceCreates a visible smoothing effect by maintaining lines of image data for each frame ofimaging. A higher setting includes more frames in the image data. Available settings depend on the transducer and exam typeTHI Tissue Harmonic Imaging Enables or disables the Tissue Harmonic Imaging feature, used to enhance contrastresolution.Note: For systems without a touch screen, the selection is assigned to a soft key.