Creating accurate and visually engaging molecular animations can be an incredible tool for molecular modellers, whether for presentations, research, or teaching. Yet, the technicalities of adding or editing keyframes can feel daunting. Thankfully, SAMSON’s Move atoms feature simplifies this task, offering flexibility and control. In this blog post, let’s explore the workflow for adding, editing, and even removing keyframes when animating atoms in SAMSON.
Why Should Molecular Modellers Care About Keyframes?
Keyframes are the cornerstone of animations. In molecular modeling, they allow you to choreograph how different atoms or systems change positions over time. This could mean visualizing a molecular interaction, showing the dynamics of a chemical process, or simply making your presentations more dynamic and accessible.
Adding a New Keyframe
The process begins by visualizing your molecule and selecting atoms. To add a new keyframe using the Move atoms animation, follow these steps:
- Open the animation track in the Animator’s Track view.
- Click on the specific frame where you want a new keyframe.
- Move the selected atoms to their desired positions for that frame.
The animation will interpolate between the keyframes, ensuring a smooth transition as the atoms move from one position to another.

If your animation requires more advanced transformations, you can use other editors instead of the Move atoms animation controllers. For instance, enable the Move editors or Twister editor to apply the transformations you need. Once done, simply add a keyframe and continue your animation workflow.
Editing Keyframes
One of the notable conveniences in SAMSON is the ability to reposition keyframes whenever necessary. If you need to fine-tune the timing of your animation:
- Simply drag the keyframe to a different position on the animation track.
This allows you to adjust the flow of your animation with precision, ensuring your molecular motion reflects your intended timing and narrative.
Removing a Keyframe
Made a mistake or changed your mind about a particular frame? No worries. To remove a keyframe:
- Right-click on the undesired keyframe in the animation track.
- Select Remove keyframe from the menu.
With this simple method, you won’t have to redo your entire animation when a small part needs adjustment.
Controlling Parameters for Smooth Animations
SAMSON also provides options to refine the parameters between keyframes. You can modify the easing curve to adjust the interpolation style, making your animations appear more natural. Additionally, you can toggle the smoothing effect to enhance the overall transition quality.

The Bottom Line
Mastering the use of keyframes in the Move atoms animation not only improves the quality of your animations but also significantly simplifies the animation process for complex molecular systems. To dive deeper into the capabilities of this feature, don’t hesitate to visit the official documentation page here: Move Atoms Animation Documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at SAMSON Connect.
