How layouts are converted
When you open a file created in a previous version, FileMaker Pro 12 applies the Classic theme to the layout. The file will look as it did in the previous version. Any new layouts you create or new objects you add to the file will have the attributes of the Classic theme. You can choose a different theme for each layout.
If you want to change the appearance of a layout, you can change themes or use Layout tools and features to modify the converted layout.
You’ll notice the following differences in layouts converted using FileMaker Pro 12:
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When you convert files to the FileMaker Pro 12 format, patterns in pre-conversion layouts are converted to images tiled to resemble the pre-conversion pattern.
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If the View menu > Show > Buttons option is selected in a file before conversion, a button badge Button badge appears in the lower right corner of any buttons that reference a script or script step.
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If the View menu > Show > Script Triggers option is selected in a file before conversion, a Layout Script Trigger badge Layout script trigger badge displays in the lower-right corner of the layout for which script triggers have been set. In the Manage Layouts dialog box, a badge appears on the folder icon Layout script trigger badge in Manage Layouts dialog box next to a layout name for which script triggers have been set.
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Any merge symbols used on layouts are converted to a new format. For example, the merge symbol for page number (##) changes to {{PageNumber}}.
Note  If you used any of the former variable symbols as static text on a layout, they will be converted to the new symbol format. You can retype symbols after conversion to correct static text.