What do I need to reset after a tool change?
Once you have set the material up on your machine you need to set X,Y Origin in the same location in reference to the jobs position on your CNC as shown in the project's Material Setup. Once this is done, it is important that this is not changed or reset during the job because all the different toolpaths will reference from this point.
However, setting Z Zero accurately following each bit change is important to ensure accurate cut depths by each tool. Be sure to set Z Zero to either the Material Top or Machine Bed depending on how the project has been setup in the Material Setup.
Tip: It is a good practice to pick a spot and Z Zero every bit at that same spot during a project. Be sure to look ahead and don't pick a spot that may get machined away by one of the toolpaths.