Tecnai on-line help manual -- Options - UT Southwestern

<strong>Tecnai</strong> on-line help Options 38Options Software version 23.6.7 Help menuThe Help menu contains two items, Show and About. Selecting Show (or pressing F1) will display thisHelp file in the <strong>Tecnai</strong> User Interface. About will display the About TEM Photomontage dialog listing thecurrent version number of the software. When reporting bugs, always include the version number in thereport.3.7 Control optionsThe software supports a range of options, defined in the Control options dialog. Options are stored asset for each user separately and recalled upon restart. Options can be saved to file and reloaded.Plate typeThe software supports rapid selection of exposure sizes from any of the three pre-defined plate cameraformats (the inch size, European cm format and Japanese cm format).The Camera dimensions consists of two values, stored separately for each camera, for the horizontaland vertical size of the exposure. In the case of the film cameras, horizontal is left to right for themicroscope operator (longest dimension for plate film), vertical is towards and away from the operator.It is advisable to check the values for the system used. Measure on a used negative the longest(= horizontal) and shortest (= vertical) exposed area (discounting the plate number). Subtract 2 to 3 mmto account for reproducibility of the plate camera.CCDNot relevant for plate photomontage.OverlapThe overlap between the exposures is the percentage of the horizontal or vertical axis that must becommon to both exposures to ensure fit of the photomontage without gaps. The overlap can be seteither automatically or at a fixed value. If done automatically the program will adjust the overlap for themagnification used (a higher value at higher magnification, typical values are 10% at 5000x or below,20% at 30kx, 30% at 50kx).Note: It is allowed to define a negative fixed overlap value. In that case the individual exposures will notoverlap but instead be spaced apart. In this way an area can be covered by a regular grid of exposureswithout requiring them to fill the whole area. This function can be used for example for statisticalanalysis.