When working on complex molecular models, even the most experienced modelers encounter moments of hesitation—was that the right adjustment? Can I roll back this step without losing progress? SAMSON, the integrative molecular design platform, alleviates these concerns with its robust History view, allowing you to seamlessly undo and redo actions.
Why Undo and Redo Matter in Molecular Modeling
In molecular modeling, perfection can often involve iteration. A small, precise tweak to a molecular structure may require several attempts to get it just right. SAMSON reduces the friction of trial and error by offering a clear, actionable history for each document, so users can move back and forth between states without worry. This feature is a game-changer for editing, building, or moving structures during your modeling sessions.
Accessing the History View
SAMSON organizes the action history per document, offering a step-by-step list of every undoable operation. To access this vital feature, simply open the History view:
- Via the menu: Navigate to Interface > History.
- With shortcuts: Press
Ctrl + 3on Windows or Linux, orCmd + 3on Mac.

How to Navigate Through Your Document’s History
The History view is designed to empower you. You can effortlessly navigate through previous states of your model using either of the following approaches:
- Click directly in the History view: The visual list of actions allows you to jump to specific moments in your workflow.
- Edit menu or shortcuts: Use the following options for efficiency:
- Undo: Quickly reverse actions with
Ctrl + Z(Windows/Linux) orCmd + Z(Mac). - Redo: Redo undone actions using
Ctrl + Y(Windows/Linux) orCmd + Y(Mac).
Practical Tips and Limitations
While the undo and redo functionalities provide substantial flexibility, it’s essential to understand their limitations. Not all operations are undoable. For instance, if a non-undoable operation is executed amidst your workflow, it might prevent some or all prior actions from being undone. This could potentially lead to data loss, so be mindful of the types of actions performed in your workflow.

Leverage History for Complex Projects
Whether you’re aligning molecular structures, making precise edits, or building entirely new models, the History view streamlines your process. By giving you the power to explore states of your work, SAMSON enables intuition-driven experimentation without the fear of irreversible changes.
Explore more about SAMSON’s undo and redo functionality with the full documentation at https://documentation.samson-connect.net/users/latest/history/.
SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at https://www.samson-connect.net.
