Eschenbach Optik Presto - Manual (Page 8)

Page 8
Presto User Manual Rev A EN
unplugging the power, any changes made during the
session are lost.
Zooming in and out
Press the upper half of the zoom control to enlarge the
magnification. The button can be held until the desired
magnification is reached. When the maximum
magnification is reached the zooming will stop.
Pressing the lower half of the zoom control will reduce the
magnification in a similar manner.
On releasing the zoom control, the selected level of
magnification will be displayed briefly in the lower right on
the screen.
Picture and Reading Modes
Picture mode offers a full colour image suitable for
viewing photographs and other images or for viewing text
without enhancement.
There are two Reading modes, positive and negative;
sometimes referred to as normal and reversed. The
positive mode enhances the contrast and removes greys.
Negative mode enhances the contrast and also reverses
the ink and paper making the letters white and the paper
black.
The Mode button is used to select the desired image
mode. Repeated pressing of the mode button will switch
from picture mode to positive to negative and back to