Apply Changes button.
This option is for modifying the channels or back-of-footpath of a road carriageway.
When modifying the path of a channel or footpath it may be necessary to make a series of changes to design the line to the desired path. For example, to make a parking bay usually requires a widening item followed by a narrowing item.
In many cases it is undesireable to recalculate the knock-on effects of a single path edit (e.g. one widening) because it may have caused a large section of the line to be changed (i.e. from that chainage all the way to the end of the road). Accordingly the knock-on effects are not calculated until you select to Apply Changes.
On the channel tools toolbar, click the Apply Changes button.