I created as an external tool in D2000 HI - a button to start an external application - notepad.exe.
I thought this button would appear in the HI process.
However, I didn’t see anything.
User toolbar (the toolbar where your button is located) is not visible by default in HI. To make it visible, go to the console/user preferences (https://doc.ipesoft.com/pages/viewpage.action?pageId=17279188) and enable “User toolbar” checkbox.