The history of commands in the command line mode is retained within a session and is very convenient but I was wondering whether there is a feature that will allow you to recall commands from previous sessions (such as in O for example - it generates an .o-history file which is being constantly updated and is very convenient). If not, is it possible to request the addition of such a feature ? There are many ways to implement this of course and I'm sure you'll find the best way, if it's not already there lurking in Chimera.