# 1. pymol.rc [Pymolrc - PyMOLWiki](https://pymolwiki.org/index.php/Pymolrc) When PyMOL launches, it will read custom settings and functions from a `pymolrc` file, if it exists. The file is simply a script written with PyMOL syntax. Usually, it's stored in `~/.pymolrc`. One can add those lines into `.pymolrc`. ``` # The comment must be added in a new line # enlarge the font size of labels, such as length of distance, residue names and others set label_size, 30 # gap (dashed line) for broken backbone set cartoon_gap_cutoff, 0 ``` ### 1.1. Cartoon gap cutoff [Cartoon gap cutoff - PyMOLWiki](https://pymolwiki.org/index.php/Cartoon_gap_cutoff) The missing loop along the protein backbone in one chain will be represented by a dashed line. Set the option `cartoon_gap_cutoff` to `0`, if you want to eliminate the dashed lines. Note that, PyMOL recognizes a chain only by `chainid`. The `TER` card is not that important.