To close molecular surfaces surface close #1 or just surf close If instead you do ~surface that hides the surface. I discourage use of these obscure "~" commands that Chimera used. Use "surface hide #1" or "surface close #1". If you just hide the surfaces they are still in the session file. You can also see the surface models in Model Panel by clicking the little triangle and the left of the model name to show submodel of your molecule. And you can choose those surface models and close them. Tom

On Jul 7, 2020, at 2:48 PM, Melissa Jurica <mjurica@ucsc.edu> wrote:

That was my first guess, so I turned off the surface view. However, no change in file size. I don’t see how to delete the surface that I calculated- still trying to get the hang of ChimeraX after switching from Chimera.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Melissa S. Jurica, Ph.D. Professor, Molecular, Cell & Developmental Biology Center for Molecular Biology of RNA University of California, Santa Cruz 1156 High Street Santa Cruz, CA 95064

Office: 450 Sinsheimer Labs Lab: 434 Sinsheimer Labs Office phone (831) 459-4427 Lab phone (831) 459-2463 Fax (831) 459-3139 http://www.mcd.ucsc.edu/faculty/jurica.html <http://www.mcd.ucsc.edu/faculty/jurica.html> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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On Jul 7, 2020, at 2:41 PM, Tom Goddard <goddard@sonic.net <mailto:goddard@sonic.net>> wrote:

Hi Melissa,

Molecular surfaces make session files very large because they save all the surface triangles. Did you have a molecular surface in that large session? I have considered not saving the molecular surfaces and just recomputing them although that will make restoring the session slower as it tries to recompute the surface.

Tom

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On Jul 7, 2020, at 2:28 PM, Melissa Jurica <mjurica@ucsc.edu <mailto:mjurica@ucsc.edu>> wrote:

What deterimines the file size of saved ChimeraX sessions (.csx files)? I saved a session of one structure (6Y5q) at 4 MB, and another structure (6y50) at 2.6 MB. However, when I saved a session with both structures open, it was a whopping 120.6 MB. Is there a way to reduce that file size?

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Melissa S. Jurica, Ph.D. Professor, Molecular, Cell & Developmental Biology Center for Molecular Biology of RNA University of California, Santa Cruz 1156 High Street Santa Cruz, CA 95064

Office: 450 Sinsheimer Labs Lab: 434 Sinsheimer Labs Office phone (831) 459-4427 Lab phone (831) 459-2463 Fax (831) 459-3139 http://www.mcd.ucsc.edu/faculty/jurica.html <http://www.mcd.ucsc.edu/faculty/jurica.html> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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