Each view is usually associated with a construction plane (CPL). When a CPL is selected, the outline of its associated view port is highlighted. In the example above, view 1, is highlighted because CPL TOP is the current CPL.
The diagram below shows the relationship between all the EdgeCAM standard views and their associated CPLs for the XY environment:
The following parameters on the General tab of the View Properties dialog control the alignment of the view port in relation to a CPL.
Track CPL – When checked the view port will automatically align itself with the current CPL.
Align to CPL – The view port is aligned to the selected CPL. The Rotate function is disabled until this option is turned off.