Revert "removed unused function"

This reverts commit f6114075c7d10d225fc65d5c8a37f441959eff88.
Revert "Working on figuring out exactly what runs during zoomAll"

This reverts commit aca2863d1f15a381565596cbce357fd1245e949f.
Shuffling code for possible speed improvements.
No longer drawing more and more drag lines. X/