used to register at the Dolphin network.

Can be connected in just Kdevelop the ssh?

Let us know how the ssh registered in Kdevelop

I don't think I understand the question. If the question is whether you can open files from ssh in KDevelop, then yes, you can do that; just go to File -> Open, enter fish://user@yourserver/ in the address line, then select your file.

I'd like to Filesystem Properties menu.

When first click on the image
Image 2 will look
I want to do this.

file> when you open> fish or sftp,
Not registered in the Filesystem menu.
'fish:root@server' disappeared briefly shown.

How can I register on the sftp Filesystem menu?(image 2)

Not sure if that's possible, but you can add a bookmark for your ssh location and click that in the bookmarks list.