3.9.15Optional setting
Operation environments are set on the Optional Setup dialog window.
To open the Optional Setup dialog window, select the Optional Setup command from the
Option menu or click the Opt Setup button 
on the tool button area of the operation panel.
.The dialog window has 5 tabs. Each has functions as follows.
(1) General tab : general setting
(a) RASTER ROTATION area
(b) LOW MAG MODE area
Select the highest magnification in the Low Mag Mode. Use [x2k] for usual operation. [x10k] is only for special requirements. Image distortion caused by field magnetic disturbance may appear at magnification higher than x2k.
(c) MICRON MARKER area
When Sizable is selected, the length of the micron
marker will be adjusted so as the length indication do not have fraction.
If Fixed is selected, the length is fixed to 30mm on 4x5 inches photograph. In this case, the length value indication some times has fraction, especially by coarse focusing.
(d) DATA ENTRY / MEASUREMENT area
Select font and size to be used in Data Entry and CD Measurement.
(e) PRINT SIZE
Set the size of images when placed on a page using Windows application software. The setting is effective only on application programs those support the X and
4x5 Photo Size button sets the value just same as photograph size.
(f) SIGNAL SELECT
When the U/L SED Ratio Variable box is checked, in Mix mode the gain ratio of upper and lower SE detector is kept to which upper and lower detectors are used independently. It is effective to control ratio of signals detected by both detectors.
If it is not checked, ratio of both two detectors is even. In this case upper detector signal will be dominant at short working distance and lower detector signal at long working distance. The latter may be easier to usual operation.
