Bio-Rad Quantity One 1-D Analysis Software - Manual (Page 324)

Appendix F. GS-800
F-3
Fig. F-2. GS-800 acquisition window
The scanning window is marked by grid lines that divide the area into square
centimeters. These are numbered 1-40 top to bottom and 1-30 left to right if the light
source is reflective, and 1-40 top to bottom and 1-29 left to right if the light source is
transmissive.
To hide the gridlines, select the Hide Grid checkbox under Options.
Below the main scanning window is the calibration strip window. Every time the
densitometer calibrates, an image of the calibration strip will appear in this window.