Hi, I routinely visualize spider format volume data that are output from Xmipp with the extension .xmp. This extension is not registered in Chimera and I have to scroll through the formats page each time to select 'spider volume data' or open the file with 'chimera spider:xxx.xmp'. Is there a way to make Chimera recognize this extension as 'spider format' automatically? There was an older Windows version that allowed to tell Chimera that all following data were of the same format as the first one but I have not seen this in any of the recent Linux versions. Thanks for hints, D. - ------------------------------------------------------------------------ Dieter Blaas, Max F. Perutz Laboratories Medical University of Vienna, Inst. Med. Biochem., Vienna Biocenter (VBC), Dr. Bohr Gasse 9/3, A-1030 Vienna, Austria, Tel: 0043 1 4277 61630, Fax: 0043 1 4277 9616, e-mail: dieter.blaas@meduniwien.ac.at ------------------------------------------------------------------------