User GuidesSnapGene User Guide PreferencesSet the Ancestor Limit for History Trees

Set the Ancestor Limit for History Trees

How do I limit the number of ancestors that can be present in a file history tree?

By default, a SnapGene sequence file embeds all of the ancestral sequences that contributed to the current construct. Those ancestral sequences can  be viewed and restored using History view. Extensive history trees can result in large SnapGene files. To limit the potential size of new SnapGene files, set an "ancestor limit".

Open Preferences

Click SnapGene → Preferences (macOS) or Edit → Preferences (Windows or Linux), and select "Files" in the sidebar.

Use the drop-down menu to choose the maximum number of levels in the history tree, or type to enter a specific number. Then check the box to "Limit file history trees".