As the Screenshot show, there is 4 custom button
There is no button as the previous Screenshot.
So I think the button may be in File Context Menu FileType CONTEXTMENU
But How Can I add a Custom Button in File Context Menu?
You can edit the File menu directly if you want to add additional things to it, the same way you've already added your own things in other places on your toolbars (e.g. the Drives field next to the File menu).
As for the items already in the file menu, edit them and see which commands they run. You can then look up the command and arguments to understand exactly what each one does. The three items in the screenshot that don't have icons are there to insert menu items which are added to the menus by external tools written for File Explorer, which Opus can also display.
yes I know that how add a custom buttons or menu in to the toolbar,
When I go to customize mode for edit the button, I don't See any one of the in the menu in customize mode, as I give you the 2nd Screenshot
Yes I know File Context Menu FileType CONTEXTMENU Just added to the menus by external tools written for File Explorer.
So Please tell me how can I get the code 4 of the button from where?
Which button?
The Search Everything item is probably coming from a shell extension Everything has installed, and inserted into the menu by one of those three commands you're already looking at.
