May be it is how you read it, but it means to:
- delete from PCB all footprints connected with symbols you just deleted from schematic,
- add right footprints for symbols that you have just added to schematic,
- update all connections to be in accoredance with current state of schematic,
- may be some other actions I just do not reckon.
Right positioning footprints at PCB is 90% of work when you design PCB.
You need not to not get any crossover tracks. At typical PCB you have at least 2 layers so you can cross tracks jumping with one on the second layer. If PCB is more complicated you can get 4 (6,8,…) layers PCB.
Some time ago I have described my strategy when designing 2 layer PCB and shown how PCB designed with this strategy can look like:
Now in V7 using my strategy you can hide GND net when positioning footprints as you have GND everywhere. That makes a connection lines mess simpler.
In V7 you can select a part of schematic and then move at PCB all elements from selection. That helps to make first order at PCB groping elements that are grouped at schematic. I can’t tell exactly how you do it as I didn’t used it yet and I am now at PC with V5 installed so I can’t check it.