No there are no settings, if you want to operate this forum from mobile then you have to tackle with the desktop view only. This theme was never made responsive. But with the next update of q2a (i.e. 1.7) a new Snow theme will be released with is completely responsive and looks much better then this one.
You can catch all the updates news from the link below.
and to see the new Snow theme you can click the link below.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.