These controls are displayed in the Circuit Settings dialog box when you select Box in the side bar menu, then click on the Local Origin tab.
This tab allows you to control the location of the anchor. The anchor is used as a reference point for distances displayed in the status bar of the project editor window.
The present location of the anchor is represented in the project editor window by the this icon:
You may specify the anchor position in the following manner:
The present distance of the cursor from the anchor, in both the x and y directions, is displayed in the status bar at the bottom of the Edit tab.
Clicking on the Local Origin icon opens the Local Origin controls also.