When working on complex molecular models, errors are inevitable. Whether it’s a structural adjustment gone wrong or an accidental transformation, the ability to reverse actions can save significant time and frustration. This is where SAMSON’s Undo and Redo functionality becomes an essential feature for molecular modelers.
Why Undo and Redo Matter in Molecular Design
In molecular modeling, precision is key. Small adjustments can drastically change the properties and behavior of a structure. Experimenting with designs often requires a trial-and-error approach, which means making reversible changes is critical. SAMSON offers a seamless Undo and Redo mechanism that allows you to navigate through your document’s history with ease.
Each document in SAMSON maintains a dedicated list of undoable actions. This means that you can safely experiment and return to a previous state without affecting your other projects. Whether you are building molecules, testing structural transformations, or moving objects, this functionality ensures flexibility and maximizes productivity.
How to Access Undo and Redo
Using Undo and Redo in SAMSON is straightforward:
- Open the History view via Interface > History or use the keyboard shortcuts:
- Windows and Linux: Ctrl + 3
- Mac: Cmd + 3
- Alternatively, use the keyboard shortcuts for Undo and Redo directly:
- Undo: Ctrl + Z (Windows and Linux), Cmd + Z (Mac)
- Redo: Ctrl + Y (Windows and Linux), Cmd + Y (Mac)
- You can also navigate through the document’s history directly by interacting with actions in the History view.

Tips for Effective Use
While the Undo and Redo functionality is powerful, understanding its limitations can enhance your workflow:
- Not all operations are undoable. For example, certain irreversible actions or external processes applied to your document might not be captured in the undo history.
- If you perform non-undoable operations between undoable actions, your ability to fully reverse changes could be compromised.
To protect your work, consider saving your progress at regular intervals and use the undo feature cautiously when you’re about to execute complex, non-reversible changes.
Conclusion
SAMSON’s Undo and Redo features are indispensable tools for anyone involved in molecular modeling. By preserving a clear and actionable history of changes, it encourages innovation while minimizing risk. Make the most of these tools to streamline your workflow and focus on building the most accurate models possible.
To explore more about managing your document’s history, check out the full documentation at this link.
SAMSON and all SAMSON Extensions are free for non-commercial use. Click here to get SAMSON and start using it today.
