Pull a cable and then install what box, in the connection to the TV can watch TV that the box called what? The
Can be changed in bulk, with altiumdesigner, for example, on the TOP layer - right click on any wire to be changed - find similar objects - ok - change the toplayer layer to bottomlayer - ok - end, test yourself, no problem at all.
General solid copper, such as the grid can be set to line width 0.3mm grid 0.6mm
Reopen once. If not, may be a bad power, for one.