In ABAP Development Tools, you have following possibilities to run or open executable development objects in SAP GUI.
You can run a development object throuhg an icon in the toolbar or a shortcut.
Every time you run an executable object, such as an ABAP program, the editor opens a new SAP GUI window by default.
If you want to have it be opened in the same view, use the SAP GUI Integration preference option.
You execute a development object in another editor.
You can open a development object from the context menu in the Project Explorer.