How to change from default background to foreground processing in ArcGIS when running any tool?

When you run a geoprocessing tool in ArcGIS, you can choose to run it in the foreground or background. By default, tools run in the background, which means you can continue working in ArcMap while the tool runs. However, you can change this setting to run tools in the foreground, which means you must wait for the tool to finish before you can continue working in ArcMap.

You can control whether tools execute in the foreground or background by clicking Geoprocessing > Geoprocessing Options on the Standard toolbar.

If Enable is not checked, tools execute in the foreground. When a tool is executing in foreground mode, you must wait until the tools stop executing before you can continue with other work.