How do trim the History from multiple files at once?
By default, a SnapGene sequence file contains embedded copies of all of the ancestral files that have contributed to the sequence. The ancestral sequences can be viewed and restored via the History view. Extensive History trees can result in very large SnapGene files. Trim a files "History" to reduce the file size.
To trim the history of a file currently open in SnapGene see - Trim History.
To set a limit on the size of any file History see - Set the Ancestor Limit for History Trees.
Start The Batch Trim Histories Tool
In the side panel, click Open Folder and open a folder that contains the files of interest.
Select all files of interest in the side panel.
Click menu File → Trim File Histories..., or in the SnapGene window, click More Actions → Trim File Histories....
In the "Trim File Histories" dialog, set the trim level, or choose to "Erase entire history" then click Trim Histories.
SnapGene will show a report listing all files modified by the "Trim Histories" operation.
Click OK to close the report.
The modified unsaved files will be selected in the side panel.
Click the ellipsis in the yellow "unsaved changes" banner and choose Save Selected to update and save all modified files.
