# Visualization with ions using trjconv -pbc nojump

**URL:** <https://gromacs.bioexcel.eu/t/visualization-with-ions-using-trjconv-pbc-nojump/9678>\
**Category:** User discussions\
**Created:** [July 18, 2024, 11:51am UTC](https://gromacs.bioexcel.eu/t/visualization-with-ions-using-trjconv-pbc-nojump/9678 "2024-07-18T11:51:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![gargi\_biswas](https://avatars.discourse-cdn.com/v4/letter/g/9f8e36/32.png) [@gargi\_biswas](https://gromacs.bioexcel.eu/u/gargi_biswas)\
**Post date:** [July 18, 2024, 11:51am UTC](https://gromacs.bioexcel.eu/t/visualization-with-ions-using-trjconv-pbc-nojump/9678/1 "2024-07-18T11:51:48Z")

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GROMACS version: 2022.1  
GROMACS modification: Yes/No  
Here post your question Hi, I am using gromacs for coarse-grained simulations. I have some explicit ions inside the box, and a big molecule. Now, I want to make movie using gmx trjconv, and I want both the molecule and ions to be present in the movie at the same time. when I am using -pbc jojump, the molecule remains intact, but the ions seems to continously drifting away throughout the whole movie, so I am not getting a good visual representation, now when I am using any other options like -pbc whole, or -pbc mol, then the ions seems to be confined within a box, but the moleule seems broken in many of the frames, so I cannot get a good movie of my simulation. Can anyone suggest me a way out?