These are automatic tool change position values of selected tool. When automatic tool change is initiated, machine will use these position values to mount or dismount requested tool.
These values are also available as parameters so you can use them in any way you want or need when configuring tool change script file.
Skip Tool Change
When enabled, selected tool will not use tool change procedure e.g. Laser.
Skip Tool Measure
When enabled, selected tool will not be measured with fixed tool sensor e.g. Probe.
If measured tool uses e.g. cutting flutes that are eccentric to tools geometry and machine would need to measure it with an eccentric offset value, then this value represents machine offset so that tool can be successfully measured.