<div dir="ltr"><div class="gmail_quote"><br><div dir="ltr">Thank you both Tom and Elaine.<div>I just test the command but it doesn't work. See attached picture.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Elaine Meng <<a href="mailto:meng@cgl.ucsf.edu" target="_blank">meng@cgl.ucsf.edu</a>> 于2022年5月25日周三 11:45写道:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Jianhao,<br>
It depends what you mean by relative position. If you mean distance, one way would be to place a marker at the map center and then measure distance between it and the marker you already have.<br>
<br>
You can place a marker at map center with "measure center" and the "mark true" option:<br>
<<a href="https://rbvi.ucsf.edu/chimerax/docs/user/commands/measure.html#center" rel="noreferrer" target="_blank">https://rbvi.ucsf.edu/chimerax/docs/user/commands/measure.html#center</a>> <br>
<br>
....or at specific coordinates such as 0,0,0 with "marker" and the "position" keyword to specify a point:<br>
<<a href="https://rbvi.ucsf.edu/chimerax/docs/user/commands/marker.html#create" rel="noreferrer" target="_blank">https://rbvi.ucsf.edu/chimerax/docs/user/commands/marker.html#create</a>><br>
<br>
Then you can select the two markers (same as atoms) with Ctrl-click, Shift-Ctrl-click and then use command "distance sel":<br>
<<a href="https://rbvi.ucsf.edu/chimerax/docs/user/commands/distance.html" rel="noreferrer" target="_blank">https://rbvi.ucsf.edu/chimerax/docs/user/commands/distance.html</a>><br>
<br>
Or regardless of whether you wanted to measure any distances, you can save the marker(s) to file and just look at the file with a text-editor to see what its coordinates are:<br>
<<a href="https://rbvi.ucsf.edu/chimerax/docs/user/markers.html" rel="noreferrer" target="_blank">https://rbvi.ucsf.edu/chimerax/docs/user/markers.html</a>><br>
<br>
I hope this helps,<br>
Elaine<br>
-----<br>
Elaine C. Meng, Ph.D. <br>
UCSF Chimera(X) team<br>
Department of Pharmaceutical Chemistry<br>
University of California, San Francisco<br>
<br>
> On May 25, 2022, at 7:54 AM, C.J. via ChimeraX-users <<a href="mailto:chimerax-users@cgl.ucsf.edu" target="_blank">chimerax-users@cgl.ucsf.edu</a>> wrote:<br>
> <br>
> Hi,<br>
> I place a marker in a cryoEM map with "Volume Tracer" tool. How can I know the relative position of the marker to the origin or center of the map? Thank you!<br>
> Best,<br>
> Jianhao<br>
<br>
</blockquote></div>
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