Jumper TX T8SG Channel Reorder

Please can someone explain to me how the channel reorder screen works. I am trying to swap channels 1 and 4 ( aileron and rudder). Many thanks,

I think "mode 4" is what you want... modes expalined
Or if you want to use these settings only in one model, you can edit the 1 and 4 channels.
In ch1 you need to edit "src" to rud and in ch4 to ail

Thank you so much for taking the trouble to reply. You were quite correct, changing the "src" on the simple mixer achieved what I wanted.

Its just that I saw the "reorder" option at the top of the mixer screen and tried to do it that way. What a mess I got into.