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News & Updates
New Setup PyMOL-open-source-windows-setup v3.1 has been released on January 20, 2025. More information under Windows Install.
New Plugin PySSA aims to combine PyMOL and ColabFold to enable the prediction and analysis of 3D protein structures for the scientific end-user. v1.0 has been released on July 10, 2024.
Official Release PyMOL v3.0 has been released on March 12, 2024.
New Plugin CavitOmiX calculate Catalophore™ cavities, predict protein structures with OpenFold by NVIDIA-BioNeMo, ESMFold and retrieve Alphafold models
Official Release PyMOL v2.5 has been released on May 10, 2021.
Python 3 New Python 3 compatibility guide for scripts and plugins
POSF New PyMOL fellowship announced for 2022-2023
Tutorial Plugins Tutorial updated for PyQt5
New Plugin PICv is a new plugin for clustering protein-protein interactions and visualization with available data from PDBe
Selection keywords New polymer.protein and polymer.nucleic selection keywords. Thanks everyone who participated in the poll!
Plugin Update MOLE 2.5 is an updated version of channel analysis software in PyMOL
New Script dssr_block is a wrapper for DSSR (3dna) and creates block-shaped nucleic acid cartoons
Older News See Older News.
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==Overview==

This setting sets the style in which cartoon helices are rendered. The default is a helix with an ellipsoid cross section. Fancy mode helices are ribbons with tubular edges à la MolScript. Cylindicial mode renders helices as solid cylinders.

Syntax

To turn on Fancy Helices:

set cartoon_fancy_helices, 1

To turn on Cylindrical Helices:

set cartoon_cylindrical_helices, 1

To return to default helices:

set cartoon_fancy_helices, 0
set cartoon_cylindrical_helices, 0

Result

Change size of default cartoon helix

To change the size of the cartoon helices when not in the fancy helix mode you change the dimensions of the oval that represents the cross section of the default cartoon representation.

set cartoon_oval_length , 0.8 # default is 1.20

and <source lang="python"> set cartoon_oval_width ..→

A Random PyMOL-generated Cover. See Covers.